5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
7 *) Support for distinct client and server supported signature algorithms.
10 *) Add certificate callback. If set this is called whenever a certificate
11 is required by client or server. An application can decide which
12 certificate chain to present based on arbitrary criteria: for example
13 supported signature algorithms. Add very simple example to s_server.
14 This fixes many of the problems and restrictions of the existing client
15 certificate callback: for example you can now clear an existing
16 certificate and specify the whole chain.
19 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
20 the certificate can be used for (if anything). Set valid_flags field
21 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
22 to have similar checks in it.
24 Add new "cert_flags" field to CERT structure and include a "strict mode".
25 This enforces some TLS certificate requirements (such as only permitting
26 certificate signature algorithms contained in the supported algorithms
27 extension) which some implementations ignore: this option should be used
28 with caution as it could cause interoperability issues.
31 *) Update and tidy signature algorithm extension processing. Work out
32 shared signature algorithms based on preferences and peer algorithms
33 and print them out in s_client and s_server. Abort handshake if no
34 shared signature algorithms.
37 *) Add new functions to allow customised supported signature algorithms
38 for SSL and SSL_CTX structures. Add options to s_client and s_server
42 *) New function SSL_certs_clear() to delete all references to certificates
43 from an SSL structure. Before this once a certificate had been added
44 it couldn't be removed.
47 *) Initial SSL tracing code. This parses out SSL/TLS records using the
48 message callback and prints the results. Needs compile time option
49 "enable-ssl-trace". New options to s_client and s_server to enable
53 *) New functions to retrieve certificate signature and signature
57 *) Print out deprecated issuer and subject unique ID fields in
62 [Emilia Kasper, Adam Langley, Ben Laurie (Google)]
64 *) Support for automatic EC temporary key parameter selection. If enabled
65 the most preferred EC parameters are automatically used instead of
66 hardcoded fixed parameters. Now a server just has to call:
67 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
68 support ECDH and use the most appropriate parameters.
71 *) Enhance and tidy EC curve and point format TLS extension code. Use
72 static structures instead of allocation if default values are used.
73 New ctrls to set curves we wish to support and to retrieve shared curves.
74 Print out shared curves in s_server. New options to s_server and s_client
75 to set list of supported curves.
78 *) New ctrls to retrieve supported signature algorithms and
79 supported curve values as an array of NIDs. Extend openssl utility
80 to print out received values.
83 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
84 between NIDs and the more common NIST names such as "P-256". Enhance
85 ecparam utility and ECC method to recognise the NIST names for curves.
88 *) Enhance SSL/TLS certificate chain handling to support different
89 chains for each certificate instead of one chain in the parent SSL_CTX.
92 *) Support for fixed DH ciphersuite client authentication: where both
93 server and client use DH certificates with common parameters.
96 *) Support for fixed DH ciphersuites: those requiring DH server
100 *) Transparently support X9.42 DH parameters when calling
101 PEM_read_bio_DHparameters. This means existing applications can handle
102 the new parameter format automatically.
105 *) Initial experimental support for X9.42 DH parameter format: mainly
106 to support use of 'q' parameter for RFC5114 parameters.
109 *) Add DH parameters from RFC5114 including test data to dhtest.
112 *) Update fips_test_suite to support multiple command line options. New
113 test to induce all self test errors in sequence and check expected
117 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
118 sign or verify all in one operation.
121 *) Add fips_algvs: a multicall fips utility incorporaing all the algorithm
122 test programs and fips_test_suite. Includes functionality to parse
123 the minimal script output of fipsalgest.pl directly.
126 *) Add authorisation parameter to FIPS_module_mode_set().
129 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
132 *) Use separate DRBG fields for internal and external flags. New function
133 FIPS_drbg_health_check() to perform on demand health checking. Add
134 generation tests to fips_test_suite with reduced health check interval to
135 demonstrate periodic health checking. Add "nodh" option to
136 fips_test_suite to skip very slow DH test.
139 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
143 *) More extensive health check for DRBG checking many more failure modes.
144 New function FIPS_selftest_drbg_all() to handle every possible DRBG
145 combination: call this in fips_test_suite.
148 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
149 and POST to handle Dual EC cases.
152 *) Add support for canonical generation of DSA parameter 'g'. See
155 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
156 POST to handle HMAC cases.
159 *) Add functions FIPS_module_version() and FIPS_module_version_text()
160 to return numberical and string versions of the FIPS module number.
163 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
164 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implmeneted
165 outside the validated module in the FIPS capable OpenSSL.
168 *) Minor change to DRBG entropy callback semantics. In some cases
169 there is no mutiple of the block length between min_len and
170 max_len. Allow the callback to return more than max_len bytes
171 of entropy but discard any extra: it is the callback's responsibility
172 to ensure that the extra data discarded does not impact the
173 requested amount of entropy.
176 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
177 information in FIPS186-3, SP800-57 and SP800-131A.
180 *) CCM support via EVP. Interface is very similar to GCM case except we
181 must supply all data in one chunk (i.e. no update, final) and the
182 message length must be supplied if AAD is used. Add algorithm test
186 *) Initial version of POST overhaul. Add POST callback to allow the status
187 of POST to be monitored and/or failures induced. Modify fips_test_suite
188 to use callback. Always run all selftests even if one fails.
191 *) XTS support including algorithm test driver in the fips_gcmtest program.
192 Note: this does increase the maximum key length from 32 to 64 bytes but
193 there should be no binary compatibility issues as existing applications
194 will never use XTS mode.
197 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
198 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
199 performs algorithm blocking for unapproved PRNG types. Also do not
200 set PRNG type in FIPS_mode_set(): leave this to the application.
201 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
202 the standard OpenSSL PRNG: set additional data to a date time vector.
205 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
206 This shouldn't present any incompatibility problems because applications
207 shouldn't be using these directly and any that are will need to rethink
208 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
211 *) Extensive self tests and health checking required by SP800-90 DRBG.
212 Remove strength parameter from FIPS_drbg_instantiate and always
213 instantiate at maximum supported strength.
216 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
219 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
222 *) New function DH_compute_key_padded() to compute a DH key and pad with
223 leading zeroes if needed: this complies with SP800-56A et al.
226 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
227 anything, incomplete, subject to change and largely untested at present.
230 *) Modify fipscanisteronly build option to only build the necessary object
231 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
234 *) Add experimental option FIPSSYMS to give all symbols in
235 fipscanister.o and FIPS or fips prefix. This will avoid
236 conflicts with future versions of OpenSSL. Add perl script
237 util/fipsas.pl to preprocess assembly language source files
238 and rename any affected symbols.
241 *) Add selftest checks and algorithm block of non-fips algorithms in
242 FIPS mode. Remove DES2 from selftests.
245 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
246 return internal method without any ENGINE dependencies. Add new
247 tiny fips sign and verify functions.
250 *) New build option no-ec2m to disable characteristic 2 code.
253 *) New build option "fipscanisteronly". This only builds fipscanister.o
254 and (currently) associated fips utilities. Uses the file Makefile.fips
255 instead of Makefile.org as the prototype.
258 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
259 Update fips_gcmtest to use IV generator.
262 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
263 setting output buffer to NULL. The *Final function must be
264 called although it will not retrieve any additional data. The tag
265 can be set or retrieved with a ctrl. The IV length is by default 12
266 bytes (96 bits) but can be set to an alternative value. If the IV
267 length exceeds the maximum IV length (currently 16 bytes) it cannot be
271 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
272 underlying do_cipher function handles all cipher semantics itself
273 including padding and finalisation. This is useful if (for example)
274 an ENGINE cipher handles block padding itself. The behaviour of
275 do_cipher is subtly changed if this flag is set: the return value
276 is the number of characters written to the output buffer (zero is
277 no longer an error code) or a negative error code. Also if the
278 input buffer is NULL and length 0 finalisation should be performed.
281 *) If a candidate issuer certificate is already part of the constructed
282 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
285 *) Improve forward-security support: add functions
287 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
288 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
290 for use by SSL/TLS servers; the callback function will be called whenever a
291 new session is created, and gets to decide whether the session may be
292 cached to make it resumable (return 0) or not (return 1). (As by the
293 SSL/TLS protocol specifications, the session_id sent by the server will be
294 empty to indicate that the session is not resumable; also, the server will
295 not generate RFC 4507 (RFC 5077) session tickets.)
297 A simple reasonable callback implementation is to return is_forward_secure.
298 This parameter will be set to 1 or 0 depending on the ciphersuite selected
299 by the SSL/TLS server library, indicating whether it can provide forward
301 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
303 *) New function OPENSSL_gmtime_diff to find the difference in days
304 and seconds between two tm structures. This will be used to provide
305 additional functionality for ASN1_TIME.
308 *) Add -trusted_first option which attempts to find certificates in the
309 trusted store even if an untrusted chain is also supplied.
312 *) Initial experimental support for explicitly trusted non-root CAs.
313 OpenSSL still tries to build a complete chain to a root but if an
314 intermediate CA has a trust setting included that is used. The first
315 setting is used: whether to trust or reject.
318 *) New -verify_name option in command line utilities to set verification
322 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
323 Add CMAC pkey methods.
326 *) Experimental regnegotiation in s_server -www mode. If the client
327 browses /reneg connection is renegotiated. If /renegcert it is
328 renegotiated requesting a certificate.
331 *) Add an "external" session cache for debugging purposes to s_server. This
332 should help trace issues which normally are only apparent in deployed
333 multi-process servers.
336 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
337 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
338 BIO_set_cipher() and some obscure PEM functions were changed so they
339 can now return an error. The RAND changes required a change to the
340 RAND_METHOD structure.
343 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
344 a gcc attribute to warn if the result of a function is ignored. This
345 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
346 whose return value is often ignored.
349 Changes between 1.0.1c and 1.0.1d [xx XXX xxxx]
351 *) Fix possible deadlock when decoding public keys.
354 *) Don't use TLS 1.0 record version number in initial client hello
358 Changes between 1.0.1b and 1.0.1c [10 May 2012]
360 *) Sanity check record length before skipping explicit IV in TLS
361 1.2, 1.1 and DTLS to avoid DoS attack.
363 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
364 fuzzing as a service testing platform.
368 *) Initialise tkeylen properly when encrypting CMS messages.
369 Thanks to Solar Designer of Openwall for reporting this issue.
372 *) In FIPS mode don't try to use composite ciphers as they are not
376 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
378 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
379 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
380 mean any application compiled against OpenSSL 1.0.0 headers setting
381 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
382 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
383 0x10000000L Any application which was previously compiled against
384 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
385 will need to be recompiled as a result. Letting be results in
386 inability to disable specifically TLS 1.1 and in client context,
387 in unlike event, limit maximum offered version to TLS 1.0 [see below].
390 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
391 disable just protocol X, but all protocols above X *if* there are
392 protocols *below* X still enabled. In more practical terms it means
393 that if application wants to disable TLS1.0 in favor of TLS1.1 and
394 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
395 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
399 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
401 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
402 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
403 in CRYPTO_realloc_clean.
405 Thanks to Tavis Ormandy, Google Security Team, for discovering this
406 issue and to Adam Langley <agl@chromium.org> for fixing it.
408 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
410 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
413 *) Workarounds for some broken servers that "hang" if a client hello
414 record length exceeds 255 bytes:
416 1. Do not use record version number > TLS 1.0 in initial client
417 hello: some (but not all) hanging servers will now work.
418 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
419 the number of ciphers sent in the client hello. This should be
420 set to an even number, such as 50, for example by passing:
421 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
422 Most broken servers should now work.
423 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
424 TLS 1.2 client support entirely.
427 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
430 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
432 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
433 STRING form instead of a DigestInfo.
436 *) The format used for MDC2 RSA signatures is inconsistent between EVP
437 and the RSA_sign/RSA_verify functions. This was made more apparent when
438 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
439 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
440 the correct format in RSA_verify so both forms transparently work.
443 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
444 STRING form instead of a DigestInfo.
447 *) Some servers which support TLS 1.0 can choke if we initially indicate
448 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
449 encrypted premaster secret. As a workaround use the maximum pemitted
450 client version in client hello, this should keep such servers happy
451 and still work with previous versions of OpenSSL.
454 *) Add support for TLS/DTLS heartbeats.
455 [Robin Seggelmann <seggelmann@fh-muenster.de>]
457 *) Add support for SCTP.
458 [Robin Seggelmann <seggelmann@fh-muenster.de>]
460 *) Improved PRNG seeding for VOS.
461 [Paul Green <Paul.Green@stratus.com>]
463 *) Extensive assembler packs updates, most notably:
465 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
466 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
467 - x86_64: bit-sliced AES implementation;
468 - ARM: NEON support, contemporary platforms optimizations;
469 - s390x: z196 support;
470 - *: GHASH and GF(2^m) multiplication implementations;
474 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
475 (removal of unnecessary code)
476 [Peter Sylvester <peter.sylvester@edelweb.fr>]
478 *) Add TLS key material exporter from RFC 5705.
481 *) Add DTLS-SRTP negotiation from RFC 5764.
484 *) Add Next Protocol Negotiation,
485 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
486 disabled with a no-npn flag to config or Configure. Code donated
488 [Adam Langley <agl@google.com> and Ben Laurie]
490 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
491 NIST-P256, NIST-P521, with constant-time single point multiplication on
492 typical inputs. Compiler support for the nonstandard type __uint128_t is
493 required to use this (present in gcc 4.4 and later, for 64-bit builds).
494 Code made available under Apache License version 2.0.
496 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
497 line to include this in your build of OpenSSL, and run "make depend" (or
498 "make update"). This enables the following EC_METHODs:
500 EC_GFp_nistp224_method()
501 EC_GFp_nistp256_method()
502 EC_GFp_nistp521_method()
504 EC_GROUP_new_by_curve_name() will automatically use these (while
505 EC_GROUP_new_curve_GFp() currently prefers the more flexible
507 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
509 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
510 all platforms. Move ssize_t definition from e_os.h to the public
511 header file e_os2.h as it now appears in public header file cms.h
514 *) New -sigopt option to the ca, req and x509 utilities. Additional
515 signature parameters can be passed using this option and in
519 *) Add RSA PSS signing function. This will generate and set the
520 appropriate AlgorithmIdentifiers for PSS based on those in the
521 corresponding EVP_MD_CTX structure. No application support yet.
524 *) Support for companion algorithm specific ASN1 signing routines.
525 New function ASN1_item_sign_ctx() signs a pre-initialised
526 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
527 the appropriate parameters.
530 *) Add new algorithm specific ASN1 verification initialisation function
531 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
532 handling will be the same no matter what EVP_PKEY_METHOD is used.
533 Add a PSS handler to support verification of PSS signatures: checked
534 against a number of sample certificates.
537 *) Add signature printing for PSS. Add PSS OIDs.
538 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
540 *) Add algorithm specific signature printing. An individual ASN1 method
541 can now print out signatures instead of the standard hex dump.
543 More complex signatures (e.g. PSS) can print out more meaningful
544 information. Include DSA version that prints out the signature
548 *) Password based recipient info support for CMS library: implementing
552 *) Split password based encryption into PBES2 and PBKDF2 functions. This
553 neatly separates the code into cipher and PBE sections and is required
554 for some algorithms that split PBES2 into separate pieces (such as
558 *) Session-handling fixes:
559 - Fix handling of connections that are resuming with a session ID,
560 but also support Session Tickets.
561 - Fix a bug that suppressed issuing of a new ticket if the client
562 presented a ticket with an expired session.
563 - Try to set the ticket lifetime hint to something reasonable.
564 - Make tickets shorter by excluding irrelevant information.
565 - On the client side, don't ignore renewed tickets.
566 [Adam Langley, Bodo Moeller (Google)]
568 *) Fix PSK session representation.
571 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
573 This work was sponsored by Intel.
576 *) Add GCM support to TLS library. Some custom code is needed to split
577 the IV between the fixed (from PRF) and explicit (from TLS record)
578 portions. This adds all GCM ciphersuites supported by RFC5288 and
579 RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
580 add a special AESGCM string for GCM only.
583 *) Expand range of ctrls for AES GCM. Permit setting invocation
584 field on decrypt and retrieval of invocation field only on encrypt.
587 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
588 As required by RFC5289 these ciphersuites cannot be used if for
589 versions of TLS earlier than 1.2.
592 *) For FIPS capable OpenSSL interpret a NULL default public key method
593 as unset and return the appopriate default but do *not* set the default.
594 This means we can return the appopriate method in applications that
595 swicth between FIPS and non-FIPS modes.
598 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
599 ENGINE is used then we cannot handle that in the FIPS module so we
600 keep original code iff non-FIPS operations are allowed.
603 *) Add -attime option to openssl utilities.
604 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
606 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
609 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
610 FIPS EC methods unconditionally for now.
613 *) New build option no-ec2m to disable characteristic 2 code.
616 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
617 all cases can be covered as some introduce binary incompatibilities.
620 *) Redirect RSA operations to FIPS module including keygen,
621 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
624 *) Add similar low level API blocking to ciphers.
627 *) Low level digest APIs are not approved in FIPS mode: any attempt
628 to use these will cause a fatal error. Applications that *really* want
629 to use them can use the private_* version instead.
632 *) Redirect cipher operations to FIPS module for FIPS builds.
635 *) Redirect digest operations to FIPS module for FIPS builds.
638 *) Update build system to add "fips" flag which will link in fipscanister.o
639 for static and shared library builds embedding a signature if needed.
642 *) Output TLS supported curves in preference order instead of numerical
643 order. This is currently hardcoded for the highest order curves first.
644 This should be configurable so applications can judge speed vs strength.
647 *) Add TLS v1.2 server support for client authentication.
650 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
654 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
655 FIPS modules versions.
658 *) Add TLS v1.2 client side support for client authentication. Keep cache
659 of handshake records longer as we don't know the hash algorithm to use
660 until after the certificate request message is received.
663 *) Initial TLS v1.2 client support. Add a default signature algorithms
664 extension including all the algorithms we support. Parse new signature
665 format in client key exchange. Relax some ECC signing restrictions for
666 TLS v1.2 as indicated in RFC5246.
669 *) Add server support for TLS v1.2 signature algorithms extension. Switch
670 to new signature format when needed using client digest preference.
671 All server ciphersuites should now work correctly in TLS v1.2. No client
672 support yet and no support for client certificates.
675 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
676 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
677 ciphersuites. At present only RSA key exchange ciphersuites work with
678 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
679 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
680 and version checking.
683 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
684 with this defined it will not be affected by any changes to ssl internal
685 structures. Add several utility functions to allow openssl application
686 to work with OPENSSL_NO_SSL_INTERN defined.
690 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
692 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
695 *) Permit abbreviated handshakes when renegotiating using the function
696 SSL_renegotiate_abbreviated().
697 [Robin Seggelmann <seggelmann@fh-muenster.de>]
699 *) Add call to ENGINE_register_all_complete() to
700 ENGINE_load_builtin_engines(), so some implementations get used
701 automatically instead of needing explicit application support.
704 *) Add support for TLS key exporter as described in RFC5705.
705 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
707 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
708 a few changes are required:
710 Add SSL_OP_NO_TLSv1_1 flag.
712 Update version checking logic to handle version 1.1.
713 Add explicit IV handling (ported from DTLS code).
714 Add command line options to s_client/s_server.
717 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
719 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
720 in CMS and PKCS7 code. When RSA decryption fails use a random key for
721 content decryption and always return the same error. Note: this attack
722 needs on average 2^20 messages so it only affects automated senders. The
723 old behaviour can be reenabled in the CMS code by setting the
724 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
725 an MMA defence is not necessary.
726 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
727 this issue. (CVE-2012-0884)
730 *) Fix CVE-2011-4619: make sure we really are receiving a
731 client hello before rejecting multiple SGC restarts. Thanks to
732 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
735 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
737 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
738 Thanks to Antonio Martin, Enterprise Secure Access Research and
739 Development, Cisco Systems, Inc. for discovering this bug and
740 preparing a fix. (CVE-2012-0050)
743 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
745 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
746 of the Vaudenay padding oracle attack on CBC mode encryption
747 which enables an efficient plaintext recovery attack against
748 the OpenSSL implementation of DTLS. Their attack exploits timing
749 differences arising during decryption processing. A research
750 paper describing this attack can be found at:
751 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
752 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
753 Security Group at Royal Holloway, University of London
754 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
755 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
756 for preparing the fix. (CVE-2011-4108)
757 [Robin Seggelmann, Michael Tuexen]
759 *) Clear bytes used for block padding of SSL 3.0 records.
761 [Adam Langley (Google)]
763 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
764 Kadianakis <desnacked@gmail.com> for discovering this issue and
765 Adam Langley for preparing the fix. (CVE-2011-4619)
766 [Adam Langley (Google)]
768 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
769 [Andrey Kulikov <amdeich@gmail.com>]
771 *) Prevent malformed RFC3779 data triggering an assertion failure.
772 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
773 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
774 [Rob Austein <sra@hactrn.net>]
776 *) Improved PRNG seeding for VOS.
777 [Paul Green <Paul.Green@stratus.com>]
779 *) Fix ssl_ciph.c set-up race.
780 [Adam Langley (Google)]
782 *) Fix spurious failures in ecdsatest.c.
783 [Emilia Käsper (Google)]
785 *) Fix the BIO_f_buffer() implementation (which was mixing different
786 interpretations of the '..._len' fields).
787 [Adam Langley (Google)]
789 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
790 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
791 threads won't reuse the same blinding coefficients.
793 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
794 lock to call BN_BLINDING_invert_ex, and avoids one use of
795 BN_BLINDING_update for each BN_BLINDING structure (previously,
796 the last update always remained unused).
797 [Emilia Käsper (Google)]
799 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
800 [Bob Buckholz (Google)]
802 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
804 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
805 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
806 [Kaspar Brand <ossl@velox.ch>]
808 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
809 for multi-threaded use of ECDH. (CVE-2011-3210)
810 [Adam Langley (Google)]
812 *) Fix x509_name_ex_d2i memory leak on bad inputs.
815 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
816 signature public key algorithm by using OID xref utilities instead.
817 Before this you could only use some ECC ciphersuites with SHA1 only.
820 *) Add protection against ECDSA timing attacks as mentioned in the paper
821 by Billy Bob Brumley and Nicola Tuveri, see:
823 http://eprint.iacr.org/2011/232.pdf
825 [Billy Bob Brumley and Nicola Tuveri]
827 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
829 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
830 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
832 *) Fix bug in string printing code: if *any* escaping is enabled we must
833 escape the escape character (backslash) or the resulting string is
837 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
839 *) Disable code workaround for ancient and obsolete Netscape browsers
840 and servers: an attacker can use it in a ciphersuite downgrade attack.
841 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
844 *) Fixed J-PAKE implementation error, originally discovered by
845 Sebastien Martini, further info and confirmation from Stefan
846 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
849 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
851 *) Fix extension code to avoid race conditions which can result in a buffer
852 overrun vulnerability: resumed sessions must not be modified as they can
853 be shared by multiple threads. CVE-2010-3864
856 *) Fix WIN32 build system to correctly link an ENGINE directory into
860 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
862 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
864 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
866 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
868 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
869 context. The operation can be customised via the ctrl mechanism in
870 case ENGINEs want to include additional functionality.
873 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
876 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
877 output hashes compatible with older versions of OpenSSL.
878 [Willy Weisz <weisz@vcpc.univie.ac.at>]
880 *) Fix compression algorithm handling: if resuming a session use the
881 compression algorithm of the resumed session instead of determining
882 it from client hello again. Don't allow server to change algorithm.
885 *) Add load_crls() function to apps tidying load_certs() too. Add option
886 to verify utility to allow additional CRLs to be included.
889 *) Update OCSP request code to permit adding custom headers to the request:
890 some responders need this.
893 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
895 [Julia Lawall <julia@diku.dk>]
897 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
898 needlessly dereferenced structures, used obsolete functions and
899 didn't handle all updated verify codes correctly.
902 *) Disable MD2 in the default configuration.
905 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
906 indicate the initial BIO being pushed or popped. This makes it possible
907 to determine whether the BIO is the one explicitly called or as a result
908 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
909 it handles reference counts correctly and doesn't zero out the I/O bio
910 when it is not being explicitly popped. WARNING: applications which
911 included workarounds for the old buggy behaviour will need to be modified
912 or they could free up already freed BIOs.
915 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
916 renaming to all platforms (within the 0.9.8 branch, this was
917 done conditionally on Netware platforms to avoid a name clash).
918 [Guenter <lists@gknw.net>]
920 *) Add ECDHE and PSK support to DTLS.
921 [Michael Tuexen <tuexen@fh-muenster.de>]
923 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
927 *) Add "missing" function EVP_MD_flags() (without this the only way to
928 retrieve a digest flags is by accessing the structure directly. Update
929 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
930 or cipher is registered as in the "from" argument. Print out all
931 registered digests in the dgst usage message instead of manually
932 attempting to work them out.
935 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
936 this allows the use of compression and extensions. Change default cipher
937 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
938 by default unless an application cipher string requests it.
941 *) Alter match criteria in PKCS12_parse(). It used to try to use local
942 key ids to find matching certificates and keys but some PKCS#12 files
943 don't follow the (somewhat unwritten) rules and this strategy fails.
944 Now just gather all certificates together and the first private key
945 then look for the first certificate that matches the key.
948 *) Support use of registered digest and cipher names for dgst and cipher
949 commands instead of having to add each one as a special case. So now
956 openssl dgst -sha256 foo
958 and this works for ENGINE based algorithms too.
962 *) Update Gost ENGINE to support parameter files.
963 [Victor B. Wagner <vitus@cryptocom.ru>]
965 *) Support GeneralizedTime in ca utility.
966 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
968 *) Enhance the hash format used for certificate directory links. The new
969 form uses the canonical encoding (meaning equivalent names will work
970 even if they aren't identical) and uses SHA1 instead of MD5. This form
971 is incompatible with the older format and as a result c_rehash should
972 be used to rebuild symbolic links.
975 *) Make PKCS#8 the default write format for private keys, replacing the
976 traditional format. This form is standardised, more secure and doesn't
977 include an implicit MD5 dependency.
980 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
981 committed to OpenSSL should pass this lot as a minimum.
984 *) Add session ticket override functionality for use by EAP-FAST.
985 [Jouni Malinen <j@w1.fi>]
987 *) Modify HMAC functions to return a value. Since these can be implemented
988 in an ENGINE errors can occur.
991 *) Type-checked OBJ_bsearch_ex.
994 *) Type-checked OBJ_bsearch. Also some constification necessitated
995 by type-checking. Still to come: TXT_DB, bsearch(?),
996 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
1000 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
1001 seconds to a tm structure directly, instead of going through OS
1002 specific date routines. This avoids any issues with OS routines such
1003 as the year 2038 bug. New *_adj() functions for ASN1 time structures
1004 and X509_time_adj_ex() to cover the extended range. The existing
1005 X509_time_adj() is still usable and will no longer have any date issues.
1008 *) Delta CRL support. New use deltas option which will attempt to locate
1009 and search any appropriate delta CRLs available.
1011 This work was sponsored by Google.
1014 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
1015 code and add additional score elements. Validate alternate CRL paths
1016 as part of the CRL checking and indicate a new error "CRL path validation
1017 error" in this case. Applications wanting additional details can use
1018 the verify callback and check the new "parent" field. If this is not
1019 NULL CRL path validation is taking place. Existing applications wont
1020 see this because it requires extended CRL support which is off by
1023 This work was sponsored by Google.
1026 *) Support for freshest CRL extension.
1028 This work was sponsored by Google.
1031 *) Initial indirect CRL support. Currently only supported in the CRLs
1032 passed directly and not via lookup. Process certificate issuer
1033 CRL entry extension and lookup CRL entries by bother issuer name
1034 and serial number. Check and process CRL issuer entry in IDP extension.
1036 This work was sponsored by Google.
1039 *) Add support for distinct certificate and CRL paths. The CRL issuer
1040 certificate is validated separately in this case. Only enabled if
1041 an extended CRL support flag is set: this flag will enable additional
1042 CRL functionality in future.
1044 This work was sponsored by Google.
1047 *) Add support for policy mappings extension.
1049 This work was sponsored by Google.
1052 *) Fixes to pathlength constraint, self issued certificate handling,
1053 policy processing to align with RFC3280 and PKITS tests.
1055 This work was sponsored by Google.
1058 *) Support for name constraints certificate extension. DN, email, DNS
1059 and URI types are currently supported.
1061 This work was sponsored by Google.
1064 *) To cater for systems that provide a pointer-based thread ID rather
1065 than numeric, deprecate the current numeric thread ID mechanism and
1066 replace it with a structure and associated callback type. This
1067 mechanism allows a numeric "hash" to be extracted from a thread ID in
1068 either case, and on platforms where pointers are larger than 'long',
1069 mixing is done to help ensure the numeric 'hash' is usable even if it
1070 can't be guaranteed unique. The default mechanism is to use "&errno"
1071 as a pointer-based thread ID to distinguish between threads.
1073 Applications that want to provide their own thread IDs should now use
1074 CRYPTO_THREADID_set_callback() to register a callback that will call
1075 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1077 Note that ERR_remove_state() is now deprecated, because it is tied
1078 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1079 to free the current thread's error state should be replaced by
1080 ERR_remove_thread_state(NULL).
1082 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1083 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1084 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1085 application was previously providing a numeric thread callback that
1086 was inappropriate for distinguishing threads, then uniqueness might
1087 have been obtained with &errno that happened immediately in the
1088 intermediate development versions of OpenSSL; this is no longer the
1089 case, the numeric thread callback will now override the automatic use
1091 [Geoff Thorpe, with help from Bodo Moeller]
1093 *) Initial support for different CRL issuing certificates. This covers a
1094 simple case where the self issued certificates in the chain exist and
1095 the real CRL issuer is higher in the existing chain.
1097 This work was sponsored by Google.
1100 *) Removed effectively defunct crypto/store from the build.
1103 *) Revamp of STACK to provide stronger type-checking. Still to come:
1104 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1105 ASN1_STRING, CONF_VALUE.
1108 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1109 RAM on SSL connections. This option can save about 34k per idle SSL.
1112 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1113 STACK, TXT_DB, bsearch, qsort.
1116 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1117 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1118 support for data, signedData, compressedData, digestedData and
1119 encryptedData, envelopedData types included. Scripts to check against
1120 RFC4134 examples draft and interop and consistency checks of many
1121 content types and variants.
1124 *) Add options to enc utility to support use of zlib compression BIO.
1127 *) Extend mk1mf to support importing of options and assembly language
1128 files from Configure script, currently only included in VC-WIN32.
1129 The assembly language rules can now optionally generate the source
1130 files from the associated perl scripts.
1133 *) Implement remaining functionality needed to support GOST ciphersuites.
1134 Interop testing has been performed using CryptoPro implementations.
1135 [Victor B. Wagner <vitus@cryptocom.ru>]
1137 *) s390x assembler pack.
1140 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1144 *) Implement Opaque PRF Input TLS extension as specified in
1145 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1146 official specification yet and no extension type assignment by
1147 IANA exists, this extension (for now) will have to be explicitly
1148 enabled when building OpenSSL by providing the extension number
1149 to use. For example, specify an option
1151 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1153 to the "config" or "Configure" script to enable the extension,
1154 assuming extension number 0x9527 (which is a completely arbitrary
1155 and unofficial assignment based on the MD5 hash of the Internet
1156 Draft). Note that by doing so, you potentially lose
1157 interoperability with other TLS implementations since these might
1158 be using the same extension number for other purposes.
1160 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1161 opaque PRF input value to use in the handshake. This will create
1162 an interal copy of the length-'len' string at 'src', and will
1163 return non-zero for success.
1165 To get more control and flexibility, provide a callback function
1168 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1169 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1173 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1176 Callback function 'cb' will be called in handshakes, and is
1177 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1178 Argument 'arg' is for application purposes (the value as given to
1179 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1180 be provided to the callback function). The callback function
1181 has to return non-zero to report success: usually 1 to use opaque
1182 PRF input just if possible, or 2 to enforce use of the opaque PRF
1183 input. In the latter case, the library will abort the handshake
1184 if opaque PRF input is not successfully negotiated.
1186 Arguments 'peerinput' and 'len' given to the callback function
1187 will always be NULL and 0 in the case of a client. A server will
1188 see the client's opaque PRF input through these variables if
1189 available (NULL and 0 otherwise). Note that if the server
1190 provides an opaque PRF input, the length must be the same as the
1191 length of the client's opaque PRF input.
1193 Note that the callback function will only be called when creating
1194 a new session (session resumption can resume whatever was
1195 previously negotiated), and will not be called in SSL 2.0
1196 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1197 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1198 for applications that need to enforce opaque PRF input.
1202 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1205 [Victor B. Wagner <vitus@cryptocom.ru>]
1207 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1208 RFC4507bis. The encrypted ticket format is an encrypted encoded
1209 SSL_SESSION structure, that way new session features are automatically
1212 If a client application caches session in an SSL_SESSION structure
1213 support is transparent because tickets are now stored in the encoded
1216 The SSL_CTX structure automatically generates keys for ticket
1217 protection in servers so again support should be possible
1218 with no application modification.
1220 If a client or server wishes to disable RFC4507 support then the option
1221 SSL_OP_NO_TICKET can be set.
1223 Add a TLS extension debugging callback to allow the contents of any client
1224 or server extensions to be examined.
1226 This work was sponsored by Google.
1229 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1230 OpenSSL should now compile cleanly on gcc 4.2
1231 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1233 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1234 support including streaming MAC support: this is required for GOST
1235 ciphersuite support.
1236 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1238 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1239 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1240 to output in BER and PEM format.
1243 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1244 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1245 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1246 ENGINE support for HMAC keys which are unextractable. New -mac and
1247 -macopt options to dgst utility.
1250 *) New option -sigopt to dgst utility. Update dgst to use
1251 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1252 alternative signing paramaters such as X9.31 or PSS in the dgst
1256 *) Change ssl_cipher_apply_rule(), the internal function that does
1257 the work each time a ciphersuite string requests enabling
1258 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1259 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1260 the order of disabled ciphersuites such that those ciphersuites
1261 that most recently went from enabled to disabled not only stay
1262 in order with respect to each other, but also have higher priority
1263 than other disabled ciphersuites the next time ciphersuites are
1266 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1267 the same ciphersuites as with "HIGH" alone, but in a specific
1268 order where the PSK ciphersuites come first (since they are the
1269 most recently disabled ciphersuites when "HIGH" is parsed).
1271 Also, change ssl_create_cipher_list() (using this new
1272 funcionality) such that between otherwise identical
1273 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1277 *) Change ssl_create_cipher_list() so that it automatically
1278 arranges the ciphersuites in reasonable order before starting
1279 to process the rule string. Thus, the definition for "DEFAULT"
1280 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1281 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1282 This makes it much easier to arrive at a reasonable default order
1283 in applications for which anonymous ciphers are OK (meaning
1284 that you can't actually use DEFAULT).
1285 [Bodo Moeller; suggested by Victor Duchovni]
1287 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1288 processing) into multiple integers instead of setting
1289 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1290 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1291 (These masks as well as the individual bit definitions are hidden
1292 away into the non-exported interface ssl/ssl_locl.h, so this
1293 change to the definition of the SSL_CIPHER structure shouldn't
1294 affect applications.) This give us more bits for each of these
1295 categories, so there is no longer a need to coagulate AES128 and
1296 AES256 into a single algorithm bit, and to coagulate Camellia128
1297 and Camellia256 into a single algorithm bit, which has led to all
1300 Thus, among other things, the kludge introduced in 0.9.7m and
1301 0.9.8e for masking out AES256 independently of AES128 or masking
1302 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1304 With the change, we also introduce new ciphersuite aliases that
1305 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1309 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1310 Use the leftmost N bytes of the signature input if the input is
1311 larger than the prime q (with N being the size in bytes of q).
1314 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1315 it yet and it is largely untested.
1318 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1321 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1322 some compilers (gcc 4.2 and later) reject their use. Safestack is
1323 reimplemented. Update ASN1 to avoid use of legacy functions.
1326 *) Win32/64 targets are linked with Winsock2.
1329 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1330 to external functions. This can be used to increase CRL handling
1331 efficiency especially when CRLs are very large by (for example) storing
1332 the CRL revoked certificates in a database.
1335 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1336 new CRLs added to a directory can be used. New command line option
1337 -verify_return_error to s_client and s_server. This causes real errors
1338 to be returned by the verify callback instead of carrying on no matter
1339 what. This reflects the way a "real world" verify callback would behave.
1342 *) GOST engine, supporting several GOST algorithms and public key formats.
1343 Kindly donated by Cryptocom.
1346 *) Partial support for Issuing Distribution Point CRL extension. CRLs
1347 partitioned by DP are handled but no indirect CRL or reason partitioning
1348 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
1349 selected via a scoring technique which handles IDP and AKID in CRLs.
1352 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
1353 will ultimately be used for all verify operations: this will remove the
1354 X509_STORE dependency on certificate verification and allow alternative
1355 lookup methods. X509_STORE based implementations of these two callbacks.
1358 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
1359 Modify get_crl() to find a valid (unexpired) CRL if possible.
1362 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
1363 this would be called X509_CRL_cmp() but that name is already used by
1364 a function that just compares CRL issuer names. Cache several CRL
1365 extensions in X509_CRL structure and cache CRLDP in X509.
1368 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
1369 this maps equivalent X509_NAME structures into a consistent structure.
1370 Name comparison can then be performed rapidly using memcmp().
1373 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
1377 *) Allow digests to supply their own micalg string for S/MIME type using
1378 the ctrl EVP_MD_CTRL_MICALG.
1381 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
1382 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
1383 ctrl. It can then customise the structure before and/or after signing
1387 *) New function OBJ_add_sigid() to allow application defined signature OIDs
1388 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
1389 to free up any added signature OIDs.
1392 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
1393 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
1394 digest and cipher tables. New options added to openssl utility:
1395 list-message-digest-algorithms and list-cipher-algorithms.
1398 *) Change the array representation of binary polynomials: the list
1399 of degrees of non-zero coefficients is now terminated with -1.
1400 Previously it was terminated with 0, which was also part of the
1401 value; thus, the array representation was not applicable to
1402 polynomials where t^0 has coefficient zero. This change makes
1403 the array representation useful in a more general context.
1406 *) Various modifications and fixes to SSL/TLS cipher string
1407 handling. For ECC, the code now distinguishes between fixed ECDH
1408 with RSA certificates on the one hand and with ECDSA certificates
1409 on the other hand, since these are separate ciphersuites. The
1410 unused code for Fortezza ciphersuites has been removed.
1412 For consistency with EDH, ephemeral ECDH is now called "EECDH"
1413 (not "ECDHE"). For consistency with the code for DH
1414 certificates, use of ECDH certificates is now considered ECDH
1415 authentication, not RSA or ECDSA authentication (the latter is
1416 merely the CA's signing algorithm and not actively used in the
1419 The temporary ciphersuite alias "ECCdraft" is no longer
1420 available, and ECC ciphersuites are no longer excluded from "ALL"
1421 and "DEFAULT". The following aliases now exist for RFC 4492
1422 ciphersuites, most of these by analogy with the DH case:
1424 kECDHr - ECDH cert, signed with RSA
1425 kECDHe - ECDH cert, signed with ECDSA
1426 kECDH - ECDH cert (signed with either RSA or ECDSA)
1427 kEECDH - ephemeral ECDH
1428 ECDH - ECDH cert or ephemeral ECDH
1434 AECDH - anonymous ECDH
1435 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
1439 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
1440 Use correct micalg parameters depending on digest(s) in signed message.
1443 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
1444 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
1447 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
1448 an engine to register a method. Add ENGINE lookups for methods and
1449 functional reference processing.
1452 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
1453 EVP_{Sign,Verify}* which allow an application to customise the signature
1457 *) New -resign option to smime utility. This adds one or more signers
1458 to an existing PKCS#7 signedData structure. Also -md option to use an
1459 alternative message digest algorithm for signing.
1462 *) Tidy up PKCS#7 routines and add new functions to make it easier to
1463 create PKCS7 structures containing multiple signers. Update smime
1464 application to support multiple signers.
1467 *) New -macalg option to pkcs12 utility to allow setting of an alternative
1471 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
1472 Reorganize PBE internals to lookup from a static table using NIDs,
1473 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
1474 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
1475 PRF which will be automatically used with PBES2.
1478 *) Replace the algorithm specific calls to generate keys in "req" with the
1482 *) Update PKCS#7 enveloped data routines to use new API. This is now
1483 supported by any public key method supporting the encrypt operation. A
1484 ctrl is added to allow the public key algorithm to examine or modify
1485 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
1489 *) Add a ctrl to asn1 method to allow a public key algorithm to express
1490 a default digest type to use. In most cases this will be SHA1 but some
1491 algorithms (such as GOST) need to specify an alternative digest. The
1492 return value indicates how strong the prefernce is 1 means optional and
1493 2 is mandatory (that is it is the only supported type). Modify
1494 ASN1_item_sign() to accept a NULL digest argument to indicate it should
1495 use the default md. Update openssl utilities to use the default digest
1496 type for signing if it is not explicitly indicated.
1499 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
1500 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
1501 signing method from the key type. This effectively removes the link
1502 between digests and public key types.
1505 *) Add an OID cross reference table and utility functions. Its purpose is to
1506 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
1507 rsaEncryption. This will allow some of the algorithm specific hackery
1508 needed to use the correct OID to be removed.
1511 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
1512 structures for PKCS7_sign(). They are now set up by the relevant public
1516 *) Add provisional EC pkey method with support for ECDSA and ECDH.
1519 *) Add support for key derivation (agreement) in the API, DH method and
1523 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
1524 public and private key formats. As a side effect these add additional
1525 command line functionality not previously available: DSA signatures can be
1526 generated and verified using pkeyutl and DH key support and generation in
1531 [Oliver Tappe <zooey@hirschkaefer.de>]
1533 *) New make target "install_html_docs" installs HTML renditions of the
1535 [Oliver Tappe <zooey@hirschkaefer.de>]
1537 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1538 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1539 support key and parameter generation and add initial key generation
1540 functionality for RSA.
1543 *) Add functions for main EVP_PKEY_method operations. The undocumented
1544 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1545 EVP_PKEY_{encrypt,decrypt}_old.
1548 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1549 key API, doesn't do much yet.
1552 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1553 public key algorithms. New option to openssl utility:
1554 "list-public-key-algorithms" to print out info.
1557 *) Implement the Supported Elliptic Curves Extension for
1558 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1561 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1562 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1565 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1566 utilities such as rsa, dsa, dsaparam etc except they process any key
1570 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1571 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1572 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1576 *) Initial support for pluggable public key ASN1.
1577 De-spaghettify the public key ASN1 handling. Move public and private
1578 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1579 algorithm specific handling to a single module within the relevant
1580 algorithm directory. Add functions to allow (near) opaque processing
1581 of public and private key structures.
1584 *) Implement the Supported Point Formats Extension for
1585 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1588 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1589 for the psk identity [hint] and the psk callback functions to the
1590 SSL_SESSION, SSL and SSL_CTX structure.
1593 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1597 SSL_CTX_use_psk_identity_hint
1598 SSL_get_psk_identity_hint
1599 SSL_get_psk_identity
1600 SSL_use_psk_identity_hint
1602 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1604 *) Add RFC 3161 compliant time stamp request creation, response generation
1605 and response verification functionality.
1606 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1608 *) Add initial support for TLS extensions, specifically for the server_name
1609 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1610 have new members for a host name. The SSL data structure has an
1611 additional member SSL_CTX *initial_ctx so that new sessions can be
1612 stored in that context to allow for session resumption, even after the
1613 SSL has been switched to a new SSL_CTX in reaction to a client's
1614 server_name extension.
1616 New functions (subject to change):
1618 SSL_get_servername()
1619 SSL_get_servername_type()
1622 New CTRL codes and macros (subject to change):
1624 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1625 - SSL_CTX_set_tlsext_servername_callback()
1626 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1627 - SSL_CTX_set_tlsext_servername_arg()
1628 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1630 openssl s_client has a new '-servername ...' option.
1632 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1633 '-key2 ...', '-servername_fatal' (subject to change). This allows
1634 testing the HostName extension for a specific single host name ('-cert'
1635 and '-key' remain fallbacks for handshakes without HostName
1636 negotiation). If the unrecogninzed_name alert has to be sent, this by
1637 default is a warning; it becomes fatal with the '-servername_fatal'
1640 [Peter Sylvester, Remy Allais, Christophe Renou]
1642 *) Whirlpool hash implementation is added.
1645 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1646 bn(64,32). Because of instruction set limitations it doesn't have
1647 any negative impact on performance. This was done mostly in order
1648 to make it possible to share assembler modules, such as bn_mul_mont
1649 implementations, between 32- and 64-bit builds without hassle.
1652 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1653 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1657 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1658 dedicated Montgomery multiplication procedure, is introduced.
1659 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1660 "64-bit" performance on certain 32-bit targets.
1663 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1664 in SSL structures. New SSL ctrl to set maximum send fragment size.
1665 Save memory by seeting the I/O buffer sizes dynamically instead of
1666 using the maximum available value.
1669 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1670 in addition to the text details.
1673 *) Very, very preliminary EXPERIMENTAL support for printing of general
1674 ASN1 structures. This currently produces rather ugly output and doesn't
1675 handle several customised structures at all.
1678 *) Integrated support for PVK file format and some related formats such
1679 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1680 these in the 'rsa' and 'dsa' utilities.
1683 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1686 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1687 place for the (very old) "NETSCAPE" format certificates which are now
1688 handled using new ASN1 code equivalents.
1691 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1692 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1693 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1696 *) Modify CRL distribution points extension code to print out previously
1697 unsupported fields. Enhance extension setting code to allow setting of
1701 *) Add print and set support for Issuing Distribution Point CRL extension.
1704 *) Change 'Configure' script to enable Camellia by default.
1707 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
1709 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1710 Thanks to Antonio Martin, Enterprise Secure Access Research and
1711 Development, Cisco Systems, Inc. for discovering this bug and
1712 preparing a fix. (CVE-2012-0050)
1715 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
1717 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1718 of the Vaudenay padding oracle attack on CBC mode encryption
1719 which enables an efficient plaintext recovery attack against
1720 the OpenSSL implementation of DTLS. Their attack exploits timing
1721 differences arising during decryption processing. A research
1722 paper describing this attack can be found at:
1723 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1724 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1725 Security Group at Royal Holloway, University of London
1726 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1727 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1728 for preparing the fix. (CVE-2011-4108)
1729 [Robin Seggelmann, Michael Tuexen]
1731 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
1732 [Ben Laurie, Kasper <ekasper@google.com>]
1734 *) Clear bytes used for block padding of SSL 3.0 records.
1736 [Adam Langley (Google)]
1738 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1739 Kadianakis <desnacked@gmail.com> for discovering this issue and
1740 Adam Langley for preparing the fix. (CVE-2011-4619)
1741 [Adam Langley (Google)]
1743 *) Prevent malformed RFC3779 data triggering an assertion failure.
1744 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1745 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1746 [Rob Austein <sra@hactrn.net>]
1748 *) Fix ssl_ciph.c set-up race.
1749 [Adam Langley (Google)]
1751 *) Fix spurious failures in ecdsatest.c.
1752 [Emilia Käsper (Google)]
1754 *) Fix the BIO_f_buffer() implementation (which was mixing different
1755 interpretations of the '..._len' fields).
1756 [Adam Langley (Google)]
1758 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1759 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1760 threads won't reuse the same blinding coefficients.
1762 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1763 lock to call BN_BLINDING_invert_ex, and avoids one use of
1764 BN_BLINDING_update for each BN_BLINDING structure (previously,
1765 the last update always remained unused).
1766 [Emilia Käsper (Google)]
1768 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1769 for multi-threaded use of ECDH.
1770 [Adam Langley (Google)]
1772 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1775 *) Add protection against ECDSA timing attacks as mentioned in the paper
1776 by Billy Bob Brumley and Nicola Tuveri, see:
1778 http://eprint.iacr.org/2011/232.pdf
1780 [Billy Bob Brumley and Nicola Tuveri]
1782 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1784 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1785 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1787 *) Fix bug in string printing code: if *any* escaping is enabled we must
1788 escape the escape character (backslash) or the resulting string is
1792 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1794 *) Disable code workaround for ancient and obsolete Netscape browsers
1795 and servers: an attacker can use it in a ciphersuite downgrade attack.
1796 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1799 *) Fixed J-PAKE implementation error, originally discovered by
1800 Sebastien Martini, further info and confirmation from Stefan
1801 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1804 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1806 *) Fix extension code to avoid race conditions which can result in a buffer
1807 overrun vulnerability: resumed sessions must not be modified as they can
1808 be shared by multiple threads. CVE-2010-3864
1811 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1814 *) Don't reencode certificate when calculating signature: cache and use
1815 the original encoding instead. This makes signature verification of
1816 some broken encodings work correctly.
1819 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1820 is also one of the inputs.
1821 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1823 *) Don't repeatedly append PBE algorithms to table if they already exist.
1824 Sort table on each new add. This effectively makes the table read only
1825 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1829 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1831 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1834 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1835 access or freeing data twice (CVE-2010-0742)
1836 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1838 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1839 common in certificates and some applications which only call
1840 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1844 Reduce copying into .apps and .test in makevms.com
1845 Don't try to use blank CA certificate in CA.com
1846 Allow use of C files from original directories in maketests.com
1847 [Steven M. Schweda" <sms@antinode.info>]
1849 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1851 *) When rejecting SSL/TLS records due to an incorrect version number, never
1852 update s->server with a new major version number. As of
1853 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1854 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1855 the previous behavior could result in a read attempt at NULL when
1856 receiving specific incorrect SSL/TLS records once record payload
1857 protection is active. (CVE-2010-0740)
1858 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1860 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1861 could be crashed if the relevant tables were not present (e.g. chrooted).
1862 [Tomas Hoger <thoger@redhat.com>]
1864 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1866 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1867 [Martin Olsson, Neel Mehta]
1869 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1870 accommodate for stack sorting, always a write lock!).
1873 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1874 excessive delays in the RAND_poll(): over a minute. As a workaround
1875 include a time check in the inner Heap32Next loop too.
1878 *) The code that handled flushing of data in SSL/TLS originally used the
1879 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1880 the problem outlined in PR#1949. The fix suggested there however can
1881 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1882 of Apache). So instead simplify the code to flush unconditionally.
1883 This should be fine since flushing with no data to flush is a no op.
1886 *) Handle TLS versions 2.0 and later properly and correctly use the
1887 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1888 off ancient servers have a habit of sticking around for a while...
1891 *) Modify compression code so it frees up structures without using the
1892 ex_data callbacks. This works around a problem where some applications
1893 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1894 restarting) then use compression (e.g. SSL with compression) later.
1895 This results in significant per-connection memory leaks and
1896 has caused some security issues including CVE-2008-1678 and
1900 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1901 change when encrypting or decrypting.
1904 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1905 connect and renegotiate with servers which do not support RI.
1906 Until RI is more widely deployed this option is enabled by default.
1909 *) Add "missing" ssl ctrls to clear options and mode.
1912 *) If client attempts to renegotiate and doesn't support RI respond with
1913 a no_renegotiation alert as required by RFC5746. Some renegotiating
1914 TLS clients will continue a connection gracefully when they receive
1915 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1916 waiting for a server hello which it will never receive. Now we treat a
1917 received no_renegotiation alert as a fatal error. This is because
1918 applications requesting a renegotiation might well expect it to succeed
1919 and would have no code in place to handle the server denying it so the
1920 only safe thing to do is to terminate the connection.
1923 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1924 peer supports secure renegotiation and 0 otherwise. Print out peer
1925 renegotiation support in s_client/s_server.
1928 *) Replace the highly broken and deprecated SPKAC certification method with
1929 the updated NID creation version. This should correctly handle UTF8.
1932 *) Implement RFC5746. Re-enable renegotiation but require the extension
1933 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1934 turns out to be a bad idea. It has been replaced by
1935 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1936 SSL_CTX_set_options(). This is really not recommended unless you
1937 know what you are doing.
1938 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1940 *) Fixes to stateless session resumption handling. Use initial_ctx when
1941 issuing and attempting to decrypt tickets in case it has changed during
1942 servername handling. Use a non-zero length session ID when attempting
1943 stateless session resumption: this makes it possible to determine if
1944 a resumption has occurred immediately after receiving server hello
1945 (several places in OpenSSL subtly assume this) instead of later in
1949 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1950 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1951 fixes for a few places where the return code is not checked
1953 [Julia Lawall <julia@diku.dk>]
1955 *) Add --strict-warnings option to Configure script to include devteam
1956 warnings in other configurations.
1959 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1960 makes it possible to install openssl libraries in locations which
1961 have names other than "lib", for example "/usr/lib64" which some
1963 [Steve Henson, based on patch from Jeremy Utley]
1965 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1966 X690 8.9.12 and can produce some misleading textual output of OIDs.
1967 [Steve Henson, reported by Dan Kaminsky]
1969 *) Delete MD2 from algorithm tables. This follows the recommendation in
1970 several standards that it is not used in new applications due to
1971 several cryptographic weaknesses. For binary compatibility reasons
1972 the MD2 API is still compiled in by default.
1975 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1979 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1980 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1982 [Guenter <lists@gknw.net>]
1984 *) Fix the server certificate chain building code to use X509_verify_cert(),
1985 it used to have an ad-hoc builder which was unable to cope with anything
1986 other than a simple chain.
1987 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1989 *) Don't check self signed certificate signatures in X509_verify_cert()
1990 by default (a flag can override this): it just wastes time without
1991 adding any security. As a useful side effect self signed root CAs
1992 with non-FIPS digests are now usable in FIPS mode.
1995 *) In dtls1_process_out_of_seq_message() the check if the current message
1996 is already buffered was missing. For every new message was memory
1997 allocated, allowing an attacker to perform an denial of service attack
1998 with sending out of seq handshake messages until there is no memory
1999 left. Additionally every future messege was buffered, even if the
2000 sequence number made no sense and would be part of another handshake.
2001 So only messages with sequence numbers less than 10 in advance will be
2002 buffered. (CVE-2009-1378)
2003 [Robin Seggelmann, discovered by Daniel Mentz]
2005 *) Records are buffered if they arrive with a future epoch to be
2006 processed after finishing the corresponding handshake. There is
2007 currently no limitation to this buffer allowing an attacker to perform
2008 a DOS attack with sending records with future epochs until there is no
2009 memory left. This patch adds the pqueue_size() function to detemine
2010 the size of a buffer and limits the record buffer to 100 entries.
2012 [Robin Seggelmann, discovered by Daniel Mentz]
2014 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
2015 parent structure is freed. (CVE-2009-1379)
2018 *) Handle non-blocking I/O properly in SSL_shutdown() call.
2019 [Darryl Miles <darryl-mailinglists@netbauds.net>]
2022 [Ilya O. <vrghost@gmail.com>]
2024 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2026 *) Disable renegotiation completely - this fixes a severe security
2027 problem (CVE-2009-3555) at the cost of breaking all
2028 renegotiation. Renegotiation can be re-enabled by setting
2029 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2030 run-time. This is really not recommended unless you know what
2034 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2036 *) Don't set val to NULL when freeing up structures, it is freed up by
2037 underlying code. If sizeof(void *) > sizeof(long) this can result in
2038 zeroing past the valid field. (CVE-2009-0789)
2039 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2041 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2042 checked correctly. This would allow some invalid signed attributes to
2043 appear to verify correctly. (CVE-2009-0591)
2044 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2046 *) Reject UniversalString and BMPString types with invalid lengths. This
2047 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2048 a legal length. (CVE-2009-0590)
2051 *) Set S/MIME signing as the default purpose rather than setting it
2052 unconditionally. This allows applications to override it at the store
2056 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2057 to handle some structures.
2060 *) Improve efficiency of mem_gets: don't search whole buffer each time
2062 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2064 *) New -hex option for openssl rand.
2067 *) Print out UTF8String and NumericString when parsing ASN1.
2070 *) Support NumericString type for name components.
2073 *) Allow CC in the environment to override the automatically chosen
2074 compiler. Note that nothing is done to ensure flags work with the
2078 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2080 *) Properly check EVP_VerifyFinal() and similar return values
2082 [Ben Laurie, Bodo Moeller, Google Security Team]
2084 *) Enable TLS extensions by default.
2087 *) Allow the CHIL engine to be loaded, whether the application is
2088 multithreaded or not. (This does not release the developer from the
2089 obligation to set up the dynamic locking callbacks.)
2090 [Sander Temme <sander@temme.net>]
2092 *) Use correct exit code if there is an error in dgst command.
2093 [Steve Henson; problem pointed out by Roland Dirlewanger]
2095 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2096 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2099 *) Add experimental JPAKE support, including demo authentication in
2100 s_client and s_server.
2103 *) Set the comparison function in v3_addr_canonize().
2104 [Rob Austein <sra@hactrn.net>]
2106 *) Add support for XMPP STARTTLS in s_client.
2107 [Philip Paeps <philip@freebsd.org>]
2109 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2110 to ensure that even with this option, only ciphersuites in the
2111 server's preference list will be accepted. (Note that the option
2112 applies only when resuming a session, so the earlier behavior was
2113 just about the algorithm choice for symmetric cryptography.)
2116 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2118 *) Fix NULL pointer dereference if a DTLS server received
2119 ChangeCipherSpec as first record (CVE-2009-1386).
2122 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
2123 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2126 *) The fix in 0.9.8c that supposedly got rid of unsafe
2127 double-checked locking was incomplete for RSA blinding,
2128 addressing just one layer of what turns out to have been
2129 doubly unsafe triple-checked locking.
2131 So now fix this for real by retiring the MONT_HELPER macro
2132 in crypto/rsa/rsa_eay.c.
2134 [Bodo Moeller; problem pointed out by Marius Schilder]
2136 *) Various precautionary measures:
2138 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2140 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2141 (NB: This would require knowledge of the secret session ticket key
2142 to exploit, in which case you'd be SOL either way.)
2144 - Change bn_nist.c so that it will properly handle input BIGNUMs
2145 outside the expected range.
2147 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2150 [Neel Mehta, Bodo Moeller]
2152 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2153 the load fails. Useful for distros.
2154 [Ben Laurie and the FreeBSD team]
2156 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2159 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2162 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2164 This work was sponsored by Logica.
2167 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2168 keystores. Support for SSL/TLS client authentication too.
2169 Not compiled unless enable-capieng specified to Configure.
2171 This work was sponsored by Logica.
2174 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2175 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2176 attribute creation routines such as certifcate requests and PKCS#12
2180 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2182 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2183 handshake which could lead to a cilent crash as found using the
2184 Codenomicon TLS test suite (CVE-2008-1672)
2185 [Steve Henson, Mark Cox]
2187 *) Fix double free in TLS server name extensions which could lead to
2188 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2191 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2193 Clear the error queue to ensure that error entries left from
2194 older function calls do not interfere with the correct operation.
2195 [Lutz Jaenicke, Erik de Castro Lopo]
2197 *) Remove root CA certificates of commercial CAs:
2199 The OpenSSL project does not recommend any specific CA and does not
2200 have any policy with respect to including or excluding any CA.
2201 Therefore it does not make any sense to ship an arbitrary selection
2202 of root CA certificates with the OpenSSL software.
2205 *) RSA OAEP patches to fix two separate invalid memory reads.
2206 The first one involves inputs when 'lzero' is greater than
2207 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2208 before the beginning of from). The second one involves inputs where
2209 the 'db' section contains nothing but zeroes (there is a one-byte
2210 invalid read after the end of 'db').
2211 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2213 *) Partial backport from 0.9.9-dev:
2215 Introduce bn_mul_mont (dedicated Montgomery multiplication
2216 procedure) as a candidate for BIGNUM assembler implementation.
2217 While 0.9.9-dev uses assembler for various architectures, only
2218 x86_64 is available by default here in the 0.9.8 branch, and
2219 32-bit x86 is available through a compile-time setting.
2221 To try the 32-bit x86 assembler implementation, use Configure
2222 option "enable-montasm" (which exists only for this backport).
2224 As "enable-montasm" for 32-bit x86 disclaims code stability
2225 anyway, in this constellation we activate additional code
2226 backported from 0.9.9-dev for further performance improvements,
2227 namely BN_from_montgomery_word. (To enable this otherwise,
2228 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2230 [Andy Polyakov (backport partially by Bodo Moeller)]
2232 *) Add TLS session ticket callback. This allows an application to set
2233 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2234 values. This is useful for key rollover for example where several key
2235 sets may exist with different names.
2238 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2239 This was broken until now in 0.9.8 releases, such that the only way
2240 a registered ENGINE could be used (assuming it initialises
2241 successfully on the host) was to explicitly set it as the default
2242 for the relevant algorithms. This is in contradiction with 0.9.7
2243 behaviour and the documentation. With this fix, when an ENGINE is
2244 registered into a given algorithm's table of implementations, the
2245 'uptodate' flag is reset so that auto-discovery will be used next
2246 time a new context for that algorithm attempts to select an
2248 [Ian Lister (tweaked by Geoff Thorpe)]
2250 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2251 implemention in the following ways:
2253 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2256 Lack of BER streaming support means one pass streaming processing is
2257 only supported if data is detached: setting the streaming flag is
2258 ignored for embedded content.
2260 CMS support is disabled by default and must be explicitly enabled
2261 with the enable-cms configuration option.
2264 *) Update the GMP engine glue to do direct copies between BIGNUM and
2265 mpz_t when openssl and GMP use the same limb size. Otherwise the
2266 existing "conversion via a text string export" trick is still used.
2267 [Paul Sheer <paulsheer@gmail.com>]
2269 *) Zlib compression BIO. This is a filter BIO which compressed and
2270 uncompresses any data passed through it.
2273 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
2274 RFC3394 compatible AES key wrapping.
2277 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
2278 sets string data without copying. X509_ALGOR_set0() and
2279 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
2280 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
2281 from an X509_ATTRIBUTE structure optionally checking it occurs only
2282 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
2286 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
2287 to get the expected BN_FLG_CONSTTIME behavior.
2288 [Bodo Moeller (Google)]
2292 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
2293 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
2294 - added some more tests to do_tests.pl
2295 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
2296 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
2297 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
2298 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
2299 - various changes to netware.pl to enable gcc-cross builds on Win32
2301 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
2302 - various changes to fix missing prototype warnings
2303 - fixed x86nasm.pl to create correct asm files for NASM COFF output
2304 - added AES, WHIRLPOOL and CPUID assembler code to build files
2305 - added missing AES assembler make rules to mk1mf.pl
2306 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
2307 [Guenter Knauf <eflash@gmx.net>]
2309 *) Implement certificate status request TLS extension defined in RFC3546.
2310 A client can set the appropriate parameters and receive the encoded
2311 OCSP response via a callback. A server can query the supplied parameters
2312 and set the encoded OCSP response in the callback. Add simplified examples
2313 to s_client and s_server.
2316 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
2318 *) Fix various bugs:
2319 + Binary incompatibility of ssl_ctx_st structure
2320 + DTLS interoperation with non-compliant servers
2321 + Don't call get_session_cb() without proposed session
2322 + Fix ia64 assembler code
2323 [Andy Polyakov, Steve Henson]
2325 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
2327 *) DTLS Handshake overhaul. There were longstanding issues with
2328 OpenSSL DTLS implementation, which were making it impossible for
2329 RFC 4347 compliant client to communicate with OpenSSL server.
2330 Unfortunately just fixing these incompatibilities would "cut off"
2331 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
2332 server keeps tolerating non RFC compliant syntax. The opposite is
2333 not true, 0.9.8f client can not communicate with earlier server.
2334 This update even addresses CVE-2007-4995.
2337 *) Changes to avoid need for function casts in OpenSSL: some compilers
2338 (gcc 4.2 and later) reject their use.
2339 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
2342 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2343 RFC4507bis. The encrypted ticket format is an encrypted encoded
2344 SSL_SESSION structure, that way new session features are automatically
2347 If a client application caches session in an SSL_SESSION structure
2348 support is transparent because tickets are now stored in the encoded
2351 The SSL_CTX structure automatically generates keys for ticket
2352 protection in servers so again support should be possible
2353 with no application modification.
2355 If a client or server wishes to disable RFC4507 support then the option
2356 SSL_OP_NO_TICKET can be set.
2358 Add a TLS extension debugging callback to allow the contents of any client
2359 or server extensions to be examined.
2361 This work was sponsored by Google.
2364 *) Add initial support for TLS extensions, specifically for the server_name
2365 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2366 have new members for a host name. The SSL data structure has an
2367 additional member SSL_CTX *initial_ctx so that new sessions can be
2368 stored in that context to allow for session resumption, even after the
2369 SSL has been switched to a new SSL_CTX in reaction to a client's
2370 server_name extension.
2372 New functions (subject to change):
2374 SSL_get_servername()
2375 SSL_get_servername_type()
2378 New CTRL codes and macros (subject to change):
2380 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2381 - SSL_CTX_set_tlsext_servername_callback()
2382 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2383 - SSL_CTX_set_tlsext_servername_arg()
2384 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2386 openssl s_client has a new '-servername ...' option.
2388 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2389 '-key2 ...', '-servername_fatal' (subject to change). This allows
2390 testing the HostName extension for a specific single host name ('-cert'
2391 and '-key' remain fallbacks for handshakes without HostName
2392 negotiation). If the unrecogninzed_name alert has to be sent, this by
2393 default is a warning; it becomes fatal with the '-servername_fatal'
2396 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
2398 *) Add AES and SSE2 assembly language support to VC++ build.
2401 *) Mitigate attack on final subtraction in Montgomery reduction.
2404 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
2405 (which previously caused an internal error).
2408 *) Squeeze another 10% out of IGE mode when in != out.
2411 *) AES IGE mode speedup.
2412 [Dean Gaudet (Google)]
2414 *) Add the Korean symmetric 128-bit cipher SEED (see
2415 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
2416 add SEED ciphersuites from RFC 4162:
2418 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
2419 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
2420 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
2421 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
2423 To minimize changes between patchlevels in the OpenSSL 0.9.8
2424 series, SEED remains excluded from compilation unless OpenSSL
2425 is configured with 'enable-seed'.
2426 [KISA, Bodo Moeller]
2428 *) Mitigate branch prediction attacks, which can be practical if a
2429 single processor is shared, allowing a spy process to extract
2430 information. For detailed background information, see
2431 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
2432 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
2433 and Necessary Software Countermeasures"). The core of the change
2434 are new versions BN_div_no_branch() and
2435 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
2436 respectively, which are slower, but avoid the security-relevant
2437 conditional branches. These are automatically called by BN_div()
2438 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
2439 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
2440 remove a conditional branch.
2442 BN_FLG_CONSTTIME is the new name for the previous
2443 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
2444 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
2445 in the exponent causes BN_mod_exp_mont() to use the alternative
2446 implementation in BN_mod_exp_mont_consttime().) The old name
2447 remains as a deprecated alias.
2449 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
2450 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
2451 constant-time implementations for more than just exponentiation.
2452 Here too the old name is kept as a deprecated alias.
2454 BN_BLINDING_new() will now use BN_dup() for the modulus so that
2455 the BN_BLINDING structure gets an independent copy of the
2456 modulus. This means that the previous "BIGNUM *m" argument to
2457 BN_BLINDING_new() and to BN_BLINDING_create_param() now
2458 essentially becomes "const BIGNUM *m", although we can't actually
2459 change this in the header file before 0.9.9. It allows
2460 RSA_setup_blinding() to use BN_with_flags() on the modulus to
2461 enable BN_FLG_CONSTTIME.
2463 [Matthew D Wood (Intel Corp)]
2465 *) In the SSL/TLS server implementation, be strict about session ID
2466 context matching (which matters if an application uses a single
2467 external cache for different purposes). Previously,
2468 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
2469 set. This did ensure strict client verification, but meant that,
2470 with applications using a single external cache for quite
2471 different requirements, clients could circumvent ciphersuite
2472 restrictions for a given session ID context by starting a session
2473 in a different context.
2476 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2477 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2478 authentication-only ciphersuites.
2481 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
2482 not complete and could lead to a possible single byte overflow
2483 (CVE-2007-5135) [Ben Laurie]
2485 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
2487 *) Since AES128 and AES256 (and similarly Camellia128 and
2488 Camellia256) share a single mask bit in the logic of
2489 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2490 kludge to work properly if AES128 is available and AES256 isn't
2491 (or if Camellia128 is available and Camellia256 isn't).
2494 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
2495 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
2496 When a point or a seed is encoded in a BIT STRING, we need to
2497 prevent the removal of trailing zero bits to get the proper DER
2498 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
2499 of a NamedBitList, for which trailing 0 bits need to be removed.)
2502 *) Have SSL/TLS server implementation tolerate "mismatched" record
2503 protocol version while receiving ClientHello even if the
2504 ClientHello is fragmented. (The server can't insist on the
2505 particular protocol version it has chosen before the ServerHello
2506 message has informed the client about his choice.)
2509 *) Add RFC 3779 support.
2510 [Rob Austein for ARIN, Ben Laurie]
2512 *) Load error codes if they are not already present instead of using a
2513 static variable. This allows them to be cleanly unloaded and reloaded.
2514 Improve header file function name parsing.
2517 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
2518 or CAPABILITY handshake as required by RFCs.
2521 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
2523 *) Introduce limits to prevent malicious keys being able to
2524 cause a denial of service. (CVE-2006-2940)
2525 [Steve Henson, Bodo Moeller]
2527 *) Fix ASN.1 parsing of certain invalid structures that can result
2528 in a denial of service. (CVE-2006-2937) [Steve Henson]
2530 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2531 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2533 *) Fix SSL client code which could crash if connecting to a
2534 malicious SSLv2 server. (CVE-2006-4343)
2535 [Tavis Ormandy and Will Drewry, Google Security Team]
2537 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
2538 match only those. Before that, "AES256-SHA" would be interpreted
2539 as a pattern and match "AES128-SHA" too (since AES128-SHA got
2540 the same strength classification in 0.9.7h) as we currently only
2541 have a single AES bit in the ciphersuite description bitmap.
2542 That change, however, also applied to ciphersuite strings such as
2543 "RC4-MD5" that intentionally matched multiple ciphersuites --
2544 namely, SSL 2.0 ciphersuites in addition to the more common ones
2545 from SSL 3.0/TLS 1.0.
2547 So we change the selection algorithm again: Naming an explicit
2548 ciphersuite selects this one ciphersuite, and any other similar
2549 ciphersuite (same bitmap) from *other* protocol versions.
2550 Thus, "RC4-MD5" again will properly select both the SSL 2.0
2551 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
2553 Since SSL 2.0 does not have any ciphersuites for which the
2554 128/256 bit distinction would be relevant, this works for now.
2555 The proper fix will be to use different bits for AES128 and
2556 AES256, which would have avoided the problems from the beginning;
2557 however, bits are scarce, so we can only do this in a new release
2558 (not just a patchlevel) when we can change the SSL_CIPHER
2559 definition to split the single 'unsigned long mask' bitmap into
2560 multiple values to extend the available space.
2564 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
2566 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2567 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2569 *) Add AES IGE and biIGE modes.
2572 *) Change the Unix randomness entropy gathering to use poll() when
2573 possible instead of select(), since the latter has some
2574 undesirable limitations.
2575 [Darryl Miles via Richard Levitte and Bodo Moeller]
2577 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
2578 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
2579 cannot be implicitly activated as part of, e.g., the "AES" alias.
2580 However, please upgrade to OpenSSL 0.9.9[-dev] for
2581 non-experimental use of the ECC ciphersuites to get TLS extension
2582 support, which is required for curve and point format negotiation
2583 to avoid potential handshake problems.
2586 *) Disable rogue ciphersuites:
2588 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2589 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2590 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2592 The latter two were purportedly from
2593 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2596 Also deactivate the remaining ciphersuites from
2597 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2598 unofficial, and the ID has long expired.
2601 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2602 dual-core machines) and other potential thread-safety issues.
2605 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2606 versions), which is now available for royalty-free use
2607 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2608 Also, add Camellia TLS ciphersuites from RFC 4132.
2610 To minimize changes between patchlevels in the OpenSSL 0.9.8
2611 series, Camellia remains excluded from compilation unless OpenSSL
2612 is configured with 'enable-camellia'.
2615 *) Disable the padding bug check when compression is in use. The padding
2616 bug check assumes the first packet is of even length, this is not
2617 necessarily true if compresssion is enabled and can result in false
2618 positives causing handshake failure. The actual bug test is ancient
2619 code so it is hoped that implementations will either have fixed it by
2620 now or any which still have the bug do not support compression.
2623 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2625 *) When applying a cipher rule check to see if string match is an explicit
2626 cipher suite and only match that one cipher suite if it is.
2629 *) Link in manifests for VC++ if needed.
2630 [Austin Ziegler <halostatue@gmail.com>]
2632 *) Update support for ECC-based TLS ciphersuites according to
2633 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2634 TLS extensions, which are supported starting with the 0.9.9
2635 branch, not in the OpenSSL 0.9.8 branch).
2638 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2639 opaque EVP_CIPHER_CTX handling.
2642 *) Fixes and enhancements to zlib compression code. We now only use
2643 "zlib1.dll" and use the default __cdecl calling convention on Win32
2644 to conform with the standards mentioned here:
2645 http://www.zlib.net/DLL_FAQ.txt
2646 Static zlib linking now works on Windows and the new --with-zlib-include
2647 --with-zlib-lib options to Configure can be used to supply the location
2648 of the headers and library. Gracefully handle case where zlib library
2652 *) Several fixes and enhancements to the OID generation code. The old code
2653 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2654 handle numbers larger than ULONG_MAX, truncated printing and had a
2655 non standard OBJ_obj2txt() behaviour.
2658 *) Add support for building of engines under engine/ as shared libraries
2659 under VC++ build system.
2662 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2663 Hopefully, we will not see any false combination of paths any more.
2666 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2668 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2669 (part of SSL_OP_ALL). This option used to disable the
2670 countermeasure against man-in-the-middle protocol-version
2671 rollback in the SSL 2.0 server implementation, which is a bad
2672 idea. (CVE-2005-2969)
2674 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2675 for Information Security, National Institute of Advanced Industrial
2676 Science and Technology [AIST], Japan)]
2678 *) Add two function to clear and return the verify parameter flags.
2681 *) Keep cipherlists sorted in the source instead of sorting them at
2682 runtime, thus removing the need for a lock.
2685 *) Avoid some small subgroup attacks in Diffie-Hellman.
2686 [Nick Mathewson and Ben Laurie]
2688 *) Add functions for well-known primes.
2691 *) Extended Windows CE support.
2692 [Satoshi Nakamura and Andy Polyakov]
2694 *) Initialize SSL_METHOD structures at compile time instead of during
2695 runtime, thus removing the need for a lock.
2698 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2699 attempting to decrypt each encrypted key in turn. Add support to
2703 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2705 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2708 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2711 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2712 key into the same file any more.
2715 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2718 *) Add -utf8 command line and config file option to 'ca'.
2719 [Stefan <stf@udoma.org]
2721 *) Removed the macro des_crypt(), as it seems to conflict with some
2722 libraries. Use DES_crypt().
2725 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2726 involves renaming the source and generated shared-libs for
2727 both. The engines will accept the corrected or legacy ids
2728 ('ncipher' and '4758_cca' respectively) when binding. NB,
2729 this only applies when building 'shared'.
2730 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2732 *) Add attribute functions to EVP_PKEY structure. Modify
2733 PKCS12_create() to recognize a CSP name attribute and
2734 use it. Make -CSP option work again in pkcs12 utility.
2737 *) Add new functionality to the bn blinding code:
2738 - automatic re-creation of the BN_BLINDING parameters after
2739 a fixed number of uses (currently 32)
2740 - add new function for parameter creation
2741 - introduce flags to control the update behaviour of the
2742 BN_BLINDING parameters
2743 - hide BN_BLINDING structure
2744 Add a second BN_BLINDING slot to the RSA structure to improve
2745 performance when a single RSA object is shared among several
2749 *) Add support for DTLS.
2750 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2752 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2753 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2756 *) Remove buggy and incompletet DH cert support from
2757 ssl/ssl_rsa.c and ssl/s3_both.c
2760 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2761 the apps/openssl applications.
2764 *) Compile clean with "-Wall -Wmissing-prototypes
2765 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2766 DEBUG_SAFESTACK must also be set.
2769 *) Change ./Configure so that certain algorithms can be disabled by default.
2770 The new counterpiece to "no-xxx" is "enable-xxx".
2772 The patented RC5 and MDC2 algorithms will now be disabled unless
2773 "enable-rc5" and "enable-mdc2", respectively, are specified.
2775 (IDEA remains enabled despite being patented. This is because IDEA
2776 is frequently required for interoperability, and there is no license
2777 fee for non-commercial use. As before, "no-idea" can be used to
2778 avoid this algorithm.)
2782 *) Add processing of proxy certificates (see RFC 3820). This work was
2783 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2784 EGEE (Enabling Grids for E-science in Europe).
2787 *) RC4 performance overhaul on modern architectures/implementations, such
2788 as Intel P4, IA-64 and AMD64.
2791 *) New utility extract-section.pl. This can be used specify an alternative
2792 section number in a pod file instead of having to treat each file as
2793 a separate case in Makefile. This can be done by adding two lines to the
2796 =for comment openssl_section:XXX
2798 The blank line is mandatory.
2802 *) New arguments -certform, -keyform and -pass for s_client and s_server
2803 to allow alternative format key and certificate files and passphrase
2807 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2808 update associated structures and add various utility functions.
2810 Add new policy related verify parameters, include policy checking in
2811 standard verify code. Enhance 'smime' application with extra parameters
2812 to support policy checking and print out.
2815 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2816 Nehemiah processors. These extensions support AES encryption in hardware
2817 as well as RNG (though RNG support is currently disabled).
2818 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2820 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2823 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2824 [Andy Polyakov and a number of other people]
2826 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2827 implementation contributed by IBM.
2828 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2830 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2831 exponent rather than 'unsigned long'. There is a corresponding change to
2832 the new 'rsa_keygen' element of the RSA_METHOD structure.
2833 [Jelte Jansen, Geoff Thorpe]
2835 *) Functionality for creating the initial serial number file is now
2836 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2838 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2839 number file to 1, which is bound to cause problems. To avoid
2840 the problems while respecting compatibility between different 0.9.7
2841 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2842 CA.pl for serial number initialization. With the new release 0.9.8,
2843 we can fix the problem directly in the 'ca' utility.)
2846 *) Reduced header interdepencies by declaring more opaque objects in
2847 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2848 give fewer recursive includes, which could break lazy source code - so
2849 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2850 developers should define this symbol when building and using openssl to
2851 ensure they track the recommended behaviour, interfaces, [etc], but
2852 backwards-compatible behaviour prevails when this isn't defined.
2855 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2858 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2859 This will generate a random key of the appropriate length based on the
2860 cipher context. The EVP_CIPHER can provide its own random key generation
2861 routine to support keys of a specific form. This is used in the des and
2862 3des routines to generate a key of the correct parity. Update S/MIME
2863 code to use new functions and hence generate correct parity DES keys.
2864 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2865 valid (weak or incorrect parity).
2868 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2869 as looking them up. This is useful when the verified structure may contain
2870 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2871 present unless the new PKCS7_NO_CRL flag is asserted.
2874 *) Extend ASN1 oid configuration module. It now additionally accepts the
2877 shortName = some long name, 1.2.3.4
2880 *) Reimplemented the BN_CTX implementation. There is now no more static
2881 limitation on the number of variables it can handle nor the depth of the
2882 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2883 information can now expand as required, and rather than having a single
2884 static array of bignums, BN_CTX now uses a linked-list of such arrays
2885 allowing it to expand on demand whilst maintaining the usefulness of
2886 BN_CTX's "bundling".
2889 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2890 to allow all RSA operations to function using a single BN_CTX.
2893 *) Preliminary support for certificate policy evaluation and checking. This
2894 is initially intended to pass the tests outlined in "Conformance Testing
2895 of Relying Party Client Certificate Path Processing Logic" v1.07.
2898 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2899 remained unused and not that useful. A variety of other little bignum
2900 tweaks and fixes have also been made continuing on from the audit (see
2904 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2905 associated ASN1, EVP and SSL functions and old ASN1 macros.
2908 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2909 and this should never fail. So the return value from the use of
2910 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2911 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2914 *) BN_CTX_get() should return zero-valued bignums, providing the same
2915 initialised value as BN_new().
2916 [Geoff Thorpe, suggested by Ulf Möller]
2918 *) Support for inhibitAnyPolicy certificate extension.
2921 *) An audit of the BIGNUM code is underway, for which debugging code is
2922 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2923 is considered valid when processing BIGNUMs, and causes execution to
2924 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2925 further steps are taken to deliberately pollute unused data in BIGNUM
2926 structures to try and expose faulty code further on. For now, openssl will
2927 (in its default mode of operation) continue to tolerate the inconsistent
2928 forms that it has tolerated in the past, but authors and packagers should
2929 consider trying openssl and their own applications when compiled with
2930 these debugging symbols defined. It will help highlight potential bugs in
2931 their own code, and will improve the test coverage for OpenSSL itself. At
2932 some point, these tighter rules will become openssl's default to improve
2933 maintainability, though the assert()s and other overheads will remain only
2934 in debugging configurations. See bn.h for more details.
2935 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2937 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2938 that can only be obtained through BN_CTX_new() (which implicitly
2939 initialises it). The presence of this function only made it possible
2940 to overwrite an existing structure (and cause memory leaks).
2943 *) Because of the callback-based approach for implementing LHASH as a
2944 template type, lh_insert() adds opaque objects to hash-tables and
2945 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2946 to clean up those corresponding objects before destroying the hash table
2947 (and losing the object pointers). So some over-zealous constifications in
2948 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2949 objects as "const" and the lh_doall[_arg] callback wrappers are not
2950 prototyped to have "const" restrictions on the object pointers they are
2951 given (and so aren't required to cast them away any more).
2954 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2955 (speed) prefers to use its own implementation. The two implementations
2956 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2957 its object type properly exposed (MS_TM) instead of casting to/from "char
2958 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2959 aren't necessarily the greatest nomenclatures - but this is what was used
2960 internally to the implementation so I've used that for now.
2963 *) Ensure that deprecated functions do not get compiled when
2964 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2965 the self-tests were still using deprecated key-generation functions so
2966 these have been updated also.
2969 *) Reorganise PKCS#7 code to separate the digest location functionality
2970 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2971 New function PKCS7_set_digest() to set the digest type for PKCS#7
2972 digestedData type. Add additional code to correctly generate the
2973 digestedData type and add support for this type in PKCS7 initialization
2977 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2978 structure of type "other".
2981 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2982 sure the loop does correctly stop and breaking ("division by zero")
2983 modulus operations are not performed. The (pre-generated) prime
2984 table crypto/bn/bn_prime.h was already correct, but it could not be
2985 re-generated on some platforms because of the "division by zero"
2986 situation in the script.
2987 [Ralf S. Engelschall]
2989 *) Update support for ECC-based TLS ciphersuites according to
2990 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2991 SHA-1 now is only used for "small" curves (where the
2992 representation of a field element takes up to 24 bytes); for
2993 larger curves, the field element resulting from ECDH is directly
2994 used as premaster secret.
2995 [Douglas Stebila (Sun Microsystems Laboratories)]
2997 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2998 curve secp160r1 to the tests.
2999 [Douglas Stebila (Sun Microsystems Laboratories)]
3001 *) Add the possibility to load symbols globally with DSO.
3002 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
3004 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
3005 control of the error stack.
3008 *) Add support for STORE in ENGINE.
3011 *) Add the STORE type. The intention is to provide a common interface
3012 to certificate and key stores, be they simple file-based stores, or
3013 HSM-type store, or LDAP stores, or...
3014 NOTE: The code is currently UNTESTED and isn't really used anywhere.
3017 *) Add a generic structure called OPENSSL_ITEM. This can be used to
3018 pass a list of arguments to any function as well as provide a way
3019 for a function to pass data back to the caller.
3022 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
3023 works like BUF_strdup() but can be used to duplicate a portion of
3024 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
3028 *) Add the function sk_find_ex() which works like sk_find(), but will
3029 return an index to an element even if an exact match couldn't be
3030 found. The index is guaranteed to point at the element where the
3031 searched-for key would be inserted to preserve sorting order.
3034 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
3035 takes an extra flags argument for optional functionality. Currently,
3036 the following flags are defined:
3038 OBJ_BSEARCH_VALUE_ON_NOMATCH
3039 This one gets OBJ_bsearch_ex() to return a pointer to the first
3040 element where the comparing function returns a negative or zero
3043 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
3044 This one gets OBJ_bsearch_ex() to return a pointer to the first
3045 element where the comparing function returns zero. This is useful
3046 if there are more than one element where the comparing function
3050 *) Make it possible to create self-signed certificates with 'openssl ca'
3051 in such a way that the self-signed certificate becomes part of the
3052 CA database and uses the same mechanisms for serial number generation
3053 as all other certificate signing. The new flag '-selfsign' enables
3054 this functionality. Adapt CA.sh and CA.pl.in.
3057 *) Add functionality to check the public key of a certificate request
3058 against a given private. This is useful to check that a certificate
3059 request can be signed by that key (self-signing).
3062 *) Make it possible to have multiple active certificates with the same
3063 subject in the CA index file. This is done only if the keyword
3064 'unique_subject' is set to 'no' in the main CA section (default
3065 if 'CA_default') of the configuration file. The value is saved
3066 with the database itself in a separate index attribute file,
3067 named like the index file with '.attr' appended to the name.
3070 *) Generate muti valued AVAs using '+' notation in config files for
3074 *) Support for nameConstraints certificate extension.
3077 *) Support for policyConstraints certificate extension.
3080 *) Support for policyMappings certificate extension.
3083 *) Make sure the default DSA_METHOD implementation only uses its
3084 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3085 and change its own handlers to be NULL so as to remove unnecessary
3086 indirection. This lets alternative implementations fallback to the
3087 default implementation more easily.
3090 *) Support for directoryName in GeneralName related extensions
3094 *) Make it possible to link applications using Makefile.shared.
3095 Make that possible even when linking against static libraries!
3098 *) Support for single pass processing for S/MIME signing. This now
3099 means that S/MIME signing can be done from a pipe, in addition
3100 cleartext signing (multipart/signed type) is effectively streaming
3101 and the signed data does not need to be all held in memory.
3103 This is done with a new flag PKCS7_STREAM. When this flag is set
3104 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3105 is done after the data is output (and digests calculated) in
3106 SMIME_write_PKCS7().
3109 *) Add full support for -rpath/-R, both in shared libraries and
3110 applications, at least on the platforms where it's known how
3114 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3115 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3116 will now compute a table of multiples of the generator that
3117 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3118 faster (notably in the case of a single point multiplication,
3119 scalar * generator).
3120 [Nils Larsch, Bodo Moeller]
3122 *) IPv6 support for certificate extensions. The various extensions
3123 which use the IP:a.b.c.d can now take IPv6 addresses using the
3124 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3128 *) Added an ENGINE that implements RSA by performing private key
3129 exponentiations with the GMP library. The conversions to and from
3130 GMP's mpz_t format aren't optimised nor are any montgomery forms
3131 cached, and on x86 it appears OpenSSL's own performance has caught up.
3132 However there are likely to be other architectures where GMP could
3133 provide a boost. This ENGINE is not built in by default, but it can be
3134 specified at Configure time and should be accompanied by the necessary
3135 linker additions, eg;
3136 ./config -DOPENSSL_USE_GMP -lgmp
3139 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3140 testing availability of engines with "-t" - the old behaviour is
3141 produced by increasing the feature's verbosity with "-tt".
3144 *) ECDSA routines: under certain error conditions uninitialized BN objects
3145 could be freed. Solution: make sure initialization is performed early
3146 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3150 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3151 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3152 software implementations. For DSA and DH, parameter generation can
3153 also be overriden by providing the appropriate method callbacks.
3156 *) Change the "progress" mechanism used in key-generation and
3157 primality testing to functions that take a new BN_GENCB pointer in
3158 place of callback/argument pairs. The new API functions have "_ex"
3159 postfixes and the older functions are reimplemented as wrappers for
3160 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3161 declarations of the old functions to help (graceful) attempts to
3162 migrate to the new functions. Also, the new key-generation API
3163 functions operate on a caller-supplied key-structure and return
3164 success/failure rather than returning a key or NULL - this is to
3165 help make "keygen" another member function of RSA_METHOD etc.
3167 Example for using the new callback interface:
3169 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3173 BN_GENCB_set(&my_cb, my_callback, my_arg);
3175 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3176 /* For the meaning of a, b in calls to my_callback(), see the
3177 * documentation of the function that calls the callback.
3178 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3179 * my_callback should return 1 if it wants BN_is_prime_ex()
3180 * to continue, or 0 to stop.
3185 *) Change the ZLIB compression method to be stateful, and make it
3186 available to TLS with the number defined in
3187 draft-ietf-tls-compression-04.txt.
3190 *) Add the ASN.1 structures and functions for CertificatePair, which
3191 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3193 CertificatePair ::= SEQUENCE {
3194 forward [0] Certificate OPTIONAL,
3195 reverse [1] Certificate OPTIONAL,
3196 -- at least one of the pair shall be present -- }
3198 Also implement the PEM functions to read and write certificate
3199 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3201 This needed to be defined, mostly for the sake of the LDAP
3202 attribute crossCertificatePair, but may prove useful elsewhere as
3206 *) Make it possible to inhibit symlinking of shared libraries in
3207 Makefile.shared, for Cygwin's sake.
3210 *) Extend the BIGNUM API by creating a function
3211 void BN_set_negative(BIGNUM *a, int neg);
3212 and a macro that behave like
3213 int BN_is_negative(const BIGNUM *a);
3215 to avoid the need to access 'a->neg' directly in applications.
3218 *) Implement fast modular reduction for pseudo-Mersenne primes
3219 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
3220 EC_GROUP_new_curve_GFp() will now automatically use this
3222 [Nils Larsch <nla@trustcenter.de>]
3224 *) Add new lock type (CRYPTO_LOCK_BN).
3227 *) Change the ENGINE framework to automatically load engines
3228 dynamically from specific directories unless they could be
3229 found to already be built in or loaded. Move all the
3230 current engines except for the cryptodev one to a new
3232 The engines in engines/ are built as shared libraries if
3233 the "shared" options was given to ./Configure or ./config.
3234 Otherwise, they are inserted in libcrypto.a.
3235 /usr/local/ssl/engines is the default directory for dynamic
3236 engines, but that can be overriden at configure time through
3237 the usual use of --prefix and/or --openssldir, and at run
3238 time with the environment variable OPENSSL_ENGINES.
3239 [Geoff Thorpe and Richard Levitte]
3241 *) Add Makefile.shared, a helper makefile to build shared
3242 libraries. Addapt Makefile.org.
3245 *) Add version info to Win32 DLLs.
3246 [Peter 'Luna' Runestig" <peter@runestig.com>]
3248 *) Add new 'medium level' PKCS#12 API. Certificates and keys
3249 can be added using this API to created arbitrary PKCS#12
3250 files while avoiding the low level API.
3252 New options to PKCS12_create(), key or cert can be NULL and
3253 will then be omitted from the output file. The encryption
3254 algorithm NIDs can be set to -1 for no encryption, the mac
3255 iteration count can be set to 0 to omit the mac.
3257 Enhance pkcs12 utility by making the -nokeys and -nocerts
3258 options work when creating a PKCS#12 file. New option -nomac
3259 to omit the mac, NONE can be set for an encryption algorithm.
3260 New code is modified to use the enhanced PKCS12_create()
3261 instead of the low level API.
3264 *) Extend ASN1 encoder to support indefinite length constructed
3265 encoding. This can output sequences tags and octet strings in
3266 this form. Modify pk7_asn1.c to support indefinite length
3267 encoding. This is experimental and needs additional code to
3268 be useful, such as an ASN1 bio and some enhanced streaming
3271 Extend template encode functionality so that tagging is passed
3272 down to the template encoder.
3275 *) Let 'openssl req' fail if an argument to '-newkey' is not
3276 recognized instead of using RSA as a default.
3279 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
3280 As these are not official, they are not included in "ALL";
3281 the "ECCdraft" ciphersuite group alias can be used to select them.
3282 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
3284 *) Add ECDH engine support.
3285 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
3287 *) Add ECDH in new directory crypto/ecdh/.
3288 [Douglas Stebila (Sun Microsystems Laboratories)]
3290 *) Let BN_rand_range() abort with an error after 100 iterations
3291 without success (which indicates a broken PRNG).
3294 *) Change BN_mod_sqrt() so that it verifies that the input value
3295 is really the square of the return value. (Previously,
3296 BN_mod_sqrt would show GIGO behaviour.)
3299 *) Add named elliptic curves over binary fields from X9.62, SECG,
3300 and WAP/WTLS; add OIDs that were still missing.
3302 [Sheueling Chang Shantz and Douglas Stebila
3303 (Sun Microsystems Laboratories)]
3305 *) Extend the EC library for elliptic curves over binary fields
3306 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
3309 EC_GF2m_simple_method
3313 EC_GROUP_new_curve_GF2m
3314 EC_GROUP_set_curve_GF2m
3315 EC_GROUP_get_curve_GF2m
3316 EC_POINT_set_affine_coordinates_GF2m
3317 EC_POINT_get_affine_coordinates_GF2m
3318 EC_POINT_set_compressed_coordinates_GF2m
3320 Point compression for binary fields is disabled by default for
3321 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
3324 As binary polynomials are represented as BIGNUMs, various members
3325 of the EC_GROUP and EC_POINT data structures can be shared
3326 between the implementations for prime fields and binary fields;
3327 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
3328 are essentially identical to their ..._GFp counterparts.
3329 (For simplicity, the '..._GFp' prefix has been dropped from
3330 various internal method names.)
3332 An internal 'field_div' method (similar to 'field_mul' and
3333 'field_sqr') has been added; this is used only for binary fields.
3335 [Sheueling Chang Shantz and Douglas Stebila
3336 (Sun Microsystems Laboratories)]
3338 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
3339 through methods ('mul', 'precompute_mult').
3341 The generic implementations (now internally called 'ec_wNAF_mul'
3342 and 'ec_wNAF_precomputed_mult') remain the default if these
3343 methods are undefined.
3345 [Sheueling Chang Shantz and Douglas Stebila
3346 (Sun Microsystems Laboratories)]
3348 *) New function EC_GROUP_get_degree, which is defined through
3349 EC_METHOD. For curves over prime fields, this returns the bit
3350 length of the modulus.
3352 [Sheueling Chang Shantz and Douglas Stebila
3353 (Sun Microsystems Laboratories)]
3355 *) New functions EC_GROUP_dup, EC_POINT_dup.
3356 (These simply call ..._new and ..._copy).
3358 [Sheueling Chang Shantz and Douglas Stebila
3359 (Sun Microsystems Laboratories)]
3361 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
3362 Polynomials are represented as BIGNUMs (where the sign bit is not
3363 used) in the following functions [macros]:
3366 BN_GF2m_sub [= BN_GF2m_add]
3367 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
3368 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
3369 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
3371 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
3372 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
3373 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
3374 BN_GF2m_cmp [= BN_ucmp]
3376 (Note that only the 'mod' functions are actually for fields GF(2^m).
3377 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
3379 For some functions, an the irreducible polynomial defining a
3380 field can be given as an 'unsigned int[]' with strictly
3381 decreasing elements giving the indices of those bits that are set;
3382 i.e., p[] represents the polynomial
3383 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
3385 p[0] > p[1] > ... > p[k] = 0.
3386 This applies to the following functions:
3391 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
3392 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
3394 BN_GF2m_mod_sqrt_arr
3395 BN_GF2m_mod_solve_quad_arr
3399 Conversion can be performed by the following functions:
3404 bntest.c has additional tests for binary polynomial arithmetic.
3406 Two implementations for BN_GF2m_mod_div() are available.
3407 The default algorithm simply uses BN_GF2m_mod_inv() and
3408 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
3409 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
3410 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
3412 [Sheueling Chang Shantz and Douglas Stebila
3413 (Sun Microsystems Laboratories)]
3415 *) Add new error code 'ERR_R_DISABLED' that can be used when some
3416 functionality is disabled at compile-time.
3417 [Douglas Stebila <douglas.stebila@sun.com>]
3419 *) Change default behaviour of 'openssl asn1parse' so that more
3420 information is visible when viewing, e.g., a certificate:
3422 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
3423 mode the content of non-printable OCTET STRINGs is output in a
3424 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
3425 avoid the appearance of a printable string.
3426 [Nils Larsch <nla@trustcenter.de>]
3428 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
3430 EC_GROUP_set_asn1_flag()
3431 EC_GROUP_get_asn1_flag()
3432 EC_GROUP_set_point_conversion_form()
3433 EC_GROUP_get_point_conversion_form()
3434 These control ASN1 encoding details:
3435 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
3436 has been set to OPENSSL_EC_NAMED_CURVE.
3437 - Points are encoded in uncompressed form by default; options for
3438 asn1_for are as for point2oct, namely
3439 POINT_CONVERSION_COMPRESSED
3440 POINT_CONVERSION_UNCOMPRESSED
3441 POINT_CONVERSION_HYBRID
3443 Also add 'seed' and 'seed_len' members to EC_GROUP with access
3446 EC_GROUP_get0_seed()
3447 EC_GROUP_get_seed_len()
3448 This is used only for ASN1 purposes (so far).
3449 [Nils Larsch <nla@trustcenter.de>]
3451 *) Add 'field_type' member to EC_METHOD, which holds the NID
3452 of the appropriate field type OID. The new function
3453 EC_METHOD_get_field_type() returns this value.
3454 [Nils Larsch <nla@trustcenter.de>]
3459 EC_POINT_point2hex()
3460 EC_POINT_hex2point()
3461 providing useful interfaces to EC_POINT_point2oct() and
3462 EC_POINT_oct2point().
3463 [Nils Larsch <nla@trustcenter.de>]
3465 *) Change internals of the EC library so that the functions
3466 EC_GROUP_set_generator()
3467 EC_GROUP_get_generator()
3468 EC_GROUP_get_order()
3469 EC_GROUP_get_cofactor()
3470 are implemented directly in crypto/ec/ec_lib.c and not dispatched
3471 to methods, which would lead to unnecessary code duplication when
3472 adding different types of curves.
3473 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
3475 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
3476 arithmetic, and such that modified wNAFs are generated
3477 (which avoid length expansion in many cases).
3480 *) Add a function EC_GROUP_check_discriminant() (defined via
3481 EC_METHOD) that verifies that the curve discriminant is non-zero.
3483 Add a function EC_GROUP_check() that makes some sanity tests
3484 on a EC_GROUP, its generator and order. This includes
3485 EC_GROUP_check_discriminant().
3486 [Nils Larsch <nla@trustcenter.de>]
3488 *) Add ECDSA in new directory crypto/ecdsa/.
3490 Add applications 'openssl ecparam' and 'openssl ecdsa'
3491 (these are based on 'openssl dsaparam' and 'openssl dsa').
3493 ECDSA support is also included in various other files across the
3494 library. Most notably,
3495 - 'openssl req' now has a '-newkey ecdsa:file' option;
3496 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
3497 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
3498 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
3499 them suitable for ECDSA where domain parameters must be
3500 extracted before the specific public key;
3501 - ECDSA engine support has been added.
3502 [Nils Larsch <nla@trustcenter.de>]
3504 *) Include some named elliptic curves, and add OIDs from X9.62,
3505 SECG, and WAP/WTLS. Each curve can be obtained from the new
3507 EC_GROUP_new_by_curve_name(),
3508 and the list of available named curves can be obtained with
3509 EC_get_builtin_curves().
3510 Also add a 'curve_name' member to EC_GROUP objects, which can be
3512 EC_GROUP_set_curve_name()
3513 EC_GROUP_get_curve_name()
3514 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
3516 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
3517 was actually never needed) and in BN_mul(). The removal in BN_mul()
3518 required a small change in bn_mul_part_recursive() and the addition
3519 of the functions bn_cmp_part_words(), bn_sub_part_words() and
3520 bn_add_part_words(), which do the same thing as bn_cmp_words(),
3521 bn_sub_words() and bn_add_words() except they take arrays with
3525 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
3527 *) Cleanse PEM buffers before freeing them since they may contain
3529 [Benjamin Bennett <ben@psc.edu>]
3531 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3532 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3533 authentication-only ciphersuites.
3536 *) Since AES128 and AES256 share a single mask bit in the logic of
3537 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3538 kludge to work properly if AES128 is available and AES256 isn't.
3541 *) Expand security boundary to match 1.1.1 module.
3544 *) Remove redundant features: hash file source, editing of test vectors
3545 modify fipsld to use external fips_premain.c signature.
3548 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
3549 run algorithm test programs.
3552 *) Make algorithm test programs more tolerant of whitespace.
3555 *) Have SSL/TLS server implementation tolerate "mismatched" record
3556 protocol version while receiving ClientHello even if the
3557 ClientHello is fragmented. (The server can't insist on the
3558 particular protocol version it has chosen before the ServerHello
3559 message has informed the client about his choice.)
3562 *) Load error codes if they are not already present instead of using a
3563 static variable. This allows them to be cleanly unloaded and reloaded.
3566 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
3568 *) Introduce limits to prevent malicious keys being able to
3569 cause a denial of service. (CVE-2006-2940)
3570 [Steve Henson, Bodo Moeller]
3572 *) Fix ASN.1 parsing of certain invalid structures that can result
3573 in a denial of service. (CVE-2006-2937) [Steve Henson]
3575 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3576 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3578 *) Fix SSL client code which could crash if connecting to a
3579 malicious SSLv2 server. (CVE-2006-4343)
3580 [Tavis Ormandy and Will Drewry, Google Security Team]
3582 *) Change ciphersuite string processing so that an explicit
3583 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
3584 will no longer include "AES128-SHA"), and any other similar
3585 ciphersuite (same bitmap) from *other* protocol versions (so that
3586 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
3587 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
3588 changes from 0.9.8b and 0.9.8d.
3591 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
3593 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3594 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3596 *) Change the Unix randomness entropy gathering to use poll() when
3597 possible instead of select(), since the latter has some
3598 undesirable limitations.
3599 [Darryl Miles via Richard Levitte and Bodo Moeller]
3601 *) Disable rogue ciphersuites:
3603 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3604 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3605 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3607 The latter two were purportedly from
3608 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3611 Also deactive the remaining ciphersuites from
3612 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3613 unofficial, and the ID has long expired.
3616 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3617 dual-core machines) and other potential thread-safety issues.
3620 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3622 *) Adapt fipsld and the build system to link against the validated FIPS
3623 module in FIPS mode.
3626 *) Fixes for VC++ 2005 build under Windows.
3629 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3630 from a Windows bash shell such as MSYS. It is autodetected from the
3631 "config" script when run from a VC++ environment. Modify standard VC++
3632 build to use fipscanister.o from the GNU make build.
3635 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3637 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3638 The value now differs depending on if you build for FIPS or not.
3639 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3640 safely run with a non-FIPSed libcrypto, as it may crash because of
3641 the difference induced by this change.
3644 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3646 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3647 (part of SSL_OP_ALL). This option used to disable the
3648 countermeasure against man-in-the-middle protocol-version
3649 rollback in the SSL 2.0 server implementation, which is a bad
3650 idea. (CVE-2005-2969)
3652 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3653 for Information Security, National Institute of Advanced Industrial
3654 Science and Technology [AIST], Japan)]
3656 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3657 mainly for FIPS compliance and not fully integrated at this stage.
3660 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3661 the exponentiation using a fixed-length exponent. (Otherwise,
3662 the information leaked through timing could expose the secret key
3663 after many signatures; cf. Bleichenbacher's attack on DSA with
3667 *) Make a new fixed-window mod_exp implementation the default for
3668 RSA, DSA, and DH private-key operations so that the sequence of
3669 squares and multiplies and the memory access pattern are
3670 independent of the particular secret key. This will mitigate
3671 cache-timing and potential related attacks.
3673 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3674 and this is automatically used by BN_mod_exp_mont() if the new flag
3675 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3676 will use this BN flag for private exponents unless the flag
3677 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3678 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3680 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3682 *) Change the client implementation for SSLv23_method() and
3683 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3684 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3685 (Previously, the SSL 2.0 backwards compatible Client Hello
3686 message format would be used even with SSL_OP_NO_SSLv2.)
3689 *) Add support for smime-type MIME parameter in S/MIME messages which some
3693 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3694 a threadsafe manner. Modify rsa code to use new function and add calls
3695 to dsa and dh code (which had race conditions before).
3698 *) Include the fixed error library code in the C error file definitions
3699 instead of fixing them up at runtime. This keeps the error code
3700 structures constant.
3703 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3705 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3708 *) Fixes for newer kerberos headers. NB: the casts are needed because
3709 the 'length' field is signed on one version and unsigned on another
3710 with no (?) obvious way to tell the difference, without these VC++
3711 complains. Also the "definition" of FAR (blank) is no longer included
3712 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
3713 some needed definitions.
3716 *) Undo Cygwin change.
3719 *) Added support for proxy certificates according to RFC 3820.
3720 Because they may be a security thread to unaware applications,
3721 they must be explicitely allowed in run-time. See
3722 docs/HOWTO/proxy_certificates.txt for further information.
3725 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
3727 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
3728 server and client random values. Previously
3729 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3730 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3732 This change has negligible security impact because:
3734 1. Server and client random values still have 24 bytes of pseudo random
3737 2. Server and client random values are sent in the clear in the initial
3740 3. The master secret is derived using the premaster secret (48 bytes in
3741 size for static RSA ciphersuites) as well as client server and random
3744 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3747 [Stephen Henson, reported by UK NISCC]
3749 *) Use Windows randomness collection on Cygwin.
3752 *) Fix hang in EGD/PRNGD query when communication socket is closed
3753 prematurely by EGD/PRNGD.
3754 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3756 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3759 *) Back-port of selected performance improvements from development
3760 branch, as well as improved support for PowerPC platforms.
3763 *) Add lots of checks for memory allocation failure, error codes to indicate
3764 failure and freeing up memory if a failure occurs.
3765 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3767 *) Add new -passin argument to dgst.
3770 *) Perform some character comparisons of different types in X509_NAME_cmp:
3771 this is needed for some certificates that reencode DNs into UTF8Strings
3772 (in violation of RFC3280) and can't or wont issue name rollover
3776 *) Make an explicit check during certificate validation to see that
3777 the CA setting in each certificate on the chain is correct. As a
3778 side effect always do the following basic checks on extensions,
3779 not just when there's an associated purpose to the check:
3781 - if there is an unhandled critical extension (unless the user
3782 has chosen to ignore this fault)
3783 - if the path length has been exceeded (if one is set at all)
3784 - that certain extensions fit the associated purpose (if one has
3788 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3790 *) Avoid a race condition when CRLs are checked in a multi threaded
3791 environment. This would happen due to the reordering of the revoked
3792 entries during signature checking and serial number lookup. Now the
3793 encoding is cached and the serial number sort performed under a lock.
3794 Add new STACK function sk_is_sorted().
3797 *) Add Delta CRL to the extension code.
3800 *) Various fixes to s3_pkt.c so alerts are sent properly.
3801 [David Holmes <d.holmes@f5.com>]
3803 *) Reduce the chances of duplicate issuer name and serial numbers (in
3804 violation of RFC3280) using the OpenSSL certificate creation utilities.
3805 This is done by creating a random 64 bit value for the initial serial
3806 number when a serial number file is created or when a self signed
3807 certificate is created using 'openssl req -x509'. The initial serial
3808 number file is created using 'openssl x509 -next_serial' in CA.pl
3809 rather than being initialized to 1.
3812 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3814 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3815 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3816 [Joe Orton, Steve Henson]
3818 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3820 [Joe Orton, Steve Henson]
3822 *) Make it possible to have multiple active certificates with the same
3823 subject in the CA index file. This is done only if the keyword
3824 'unique_subject' is set to 'no' in the main CA section (default
3825 if 'CA_default') of the configuration file. The value is saved
3826 with the database itself in a separate index attribute file,
3827 named like the index file with '.attr' appended to the name.
3830 *) X509 verify fixes. Disable broken certificate workarounds when
3831 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3832 keyUsage extension present. Don't accept CRLs with unhandled critical
3833 extensions: since verify currently doesn't process CRL extensions this
3834 rejects a CRL with *any* critical extensions. Add new verify error codes
3838 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3839 A clarification of RFC2560 will require the use of OCTET STRINGs and
3840 some implementations cannot handle the current raw format. Since OpenSSL
3841 copies and compares OCSP nonces as opaque blobs without any attempt at
3842 parsing them this should not create any compatibility issues.
3845 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3846 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3847 this HMAC (and other) operations are several times slower than OpenSSL
3851 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3852 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3854 *) Use the correct content when signing type "other".
3857 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3859 *) Fix various bugs revealed by running the NISCC test suite:
3861 Stop out of bounds reads in the ASN1 code when presented with
3862 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3864 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3866 If verify callback ignores invalid public key errors don't try to check
3867 certificate signature with the NULL public key.
3871 *) New -ignore_err option in ocsp application to stop the server
3872 exiting on the first error in a request.
3875 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3876 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3880 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3881 extra data after the compression methods not only for TLS 1.0
3882 but also for SSL 3.0 (as required by the specification).
3883 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3885 *) Change X509_certificate_type() to mark the key as exported/exportable
3886 when it's 512 *bits* long, not 512 bytes.
3889 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3890 blocks during encryption.
3893 *) Various fixes to base64 BIO and non blocking I/O. On write
3894 flushes were not handled properly if the BIO retried. On read
3895 data was not being buffered properly and had various logic bugs.
3896 This also affects blocking I/O when the data being decoded is a
3900 *) Various S/MIME bugfixes and compatibility changes:
3901 output correct application/pkcs7 MIME type if
3902 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3903 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3904 of files as .eml work). Correctly handle very long lines in MIME
3908 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3910 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3911 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3912 a protocol version number mismatch like a decryption error
3913 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3916 *) Turn on RSA blinding by default in the default implementation
3917 to avoid a timing attack. Applications that don't want it can call
3918 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3919 They would be ill-advised to do so in most cases.
3920 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3922 *) Change RSA blinding code so that it works when the PRNG is not
3923 seeded (in this case, the secret RSA exponent is abused as
3924 an unpredictable seed -- if it is not unpredictable, there
3925 is no point in blinding anyway). Make RSA blinding thread-safe
3926 by remembering the creator's thread ID in rsa->blinding and
3927 having all other threads use local one-time blinding factors
3928 (this requires more computation than sharing rsa->blinding, but
3929 avoids excessive locking; and if an RSA object is not shared
3930 between threads, blinding will still be very fast).
3933 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3934 ENGINE as defaults for all supported algorithms irrespective of
3935 the 'flags' parameter. 'flags' is now honoured, so applications
3936 should make sure they are passing it correctly.
3939 *) Target "mingw" now allows native Windows code to be generated in
3940 the Cygwin environment as well as with the MinGW compiler.
3943 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3945 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3946 via timing by performing a MAC computation even if incorrrect
3947 block cipher padding has been found. This is a countermeasure
3948 against active attacks where the attacker has to distinguish
3949 between bad padding and a MAC verification error. (CVE-2003-0078)
3951 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3952 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3953 Martin Vuagnoux (EPFL, Ilion)]
3955 *) Make the no-err option work as intended. The intention with no-err
3956 is not to have the whole error stack handling routines removed from
3957 libcrypto, it's only intended to remove all the function name and
3958 reason texts, thereby removing some of the footprint that may not
3959 be interesting if those errors aren't displayed anyway.
3961 NOTE: it's still possible for any application or module to have it's
3962 own set of error texts inserted. The routines are there, just not
3963 used by default when no-err is given.
3966 *) Add support for FreeBSD on IA64.
3967 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3969 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3970 Kerberos function mit_des_cbc_cksum(). Before this change,
3971 the value returned by DES_cbc_cksum() was like the one from
3972 mit_des_cbc_cksum(), except the bytes were swapped.
3973 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3975 *) Allow an application to disable the automatic SSL chain building.
3976 Before this a rather primitive chain build was always performed in
3977 ssl3_output_cert_chain(): an application had no way to send the
3978 correct chain if the automatic operation produced an incorrect result.
3980 Now the chain builder is disabled if either:
3982 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3984 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3986 The reasoning behind this is that an application would not want the
3987 auto chain building to take place if extra chain certificates are
3988 present and it might also want a means of sending no additional
3989 certificates (for example the chain has two certificates and the
3993 *) Add the possibility to build without the ENGINE framework.
3994 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3996 *) Under Win32 gmtime() can return NULL: check return value in
3997 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
4000 *) DSA routines: under certain error conditions uninitialized BN objects
4001 could be freed. Solution: make sure initialization is performed early
4002 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
4003 Nils Larsch <nla@trustcenter.de> via PR#459)
4006 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
4007 checked on reconnect on the client side, therefore session resumption
4008 could still fail with a "ssl session id is different" error. This
4009 behaviour is masked when SSL_OP_ALL is used due to
4010 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
4011 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
4012 followup to PR #377.
4015 *) IA-32 assembler support enhancements: unified ELF targets, support
4016 for SCO/Caldera platforms, fix for Cygwin shared build.
4019 *) Add support for FreeBSD on sparc64. As a consequence, support for
4020 FreeBSD on non-x86 processors is separate from x86 processors on
4021 the config script, much like the NetBSD support.
4022 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
4024 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
4026 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
4029 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
4030 code (06) was taken as the first octet of the session ID and the last
4031 octet was ignored consequently. As a result SSLv2 client side session
4032 caching could not have worked due to the session ID mismatch between
4034 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
4038 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
4039 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
4043 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
4044 seems that in spite of existing for more than a year, many application
4045 author have done nothing to provide the necessary callbacks, which
4046 means that this particular engine will not work properly anywhere.
4047 This is a very unfortunate situation which forces us, in the name
4048 of usability, to give the hw_ncipher.c a static lock, which is part
4050 NOTE: This is for the 0.9.7 series ONLY. This hack will never
4051 appear in 0.9.8 or later. We EXPECT application authors to have
4052 dealt properly with this when 0.9.8 is released (unless we actually
4053 make such changes in the libcrypto locking code that changes will
4054 have to be made anyway).
4057 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
4058 octets have been read, EOF or an error occurs. Without this change
4059 some truncated ASN1 structures will not produce an error.
4062 *) Disable Heimdal support, since it hasn't been fully implemented.
4063 Still give the possibility to force the use of Heimdal, but with
4064 warnings and a request that patches get sent to openssl-dev.
4067 *) Add the VC-CE target, introduce the WINCE sysname, and add
4068 INSTALL.WCE and appropriate conditionals to make it build.
4069 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
4071 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
4072 cygssl-x.y.z.dll, where x, y and z are the major, minor and
4073 edit numbers of the version.
4074 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
4076 *) Introduce safe string copy and catenation functions
4077 (BUF_strlcpy() and BUF_strlcat()).
4078 [Ben Laurie (CHATS) and Richard Levitte]
4080 *) Avoid using fixed-size buffers for one-line DNs.
4081 [Ben Laurie (CHATS)]
4083 *) Add BUF_MEM_grow_clean() to avoid information leakage when
4084 resizing buffers containing secrets, and use where appropriate.
4085 [Ben Laurie (CHATS)]
4087 *) Avoid using fixed size buffers for configuration file location.
4088 [Ben Laurie (CHATS)]
4090 *) Avoid filename truncation for various CA files.
4091 [Ben Laurie (CHATS)]
4093 *) Use sizeof in preference to magic numbers.
4094 [Ben Laurie (CHATS)]
4096 *) Avoid filename truncation in cert requests.
4097 [Ben Laurie (CHATS)]
4099 *) Add assertions to check for (supposedly impossible) buffer
4101 [Ben Laurie (CHATS)]
4103 *) Don't cache truncated DNS entries in the local cache (this could
4104 potentially lead to a spoofing attack).
4105 [Ben Laurie (CHATS)]
4107 *) Fix various buffers to be large enough for hex/decimal
4108 representations in a platform independent manner.
4109 [Ben Laurie (CHATS)]
4111 *) Add CRYPTO_realloc_clean() to avoid information leakage when
4112 resizing buffers containing secrets, and use where appropriate.
4113 [Ben Laurie (CHATS)]
4115 *) Add BIO_indent() to avoid much slightly worrying code to do
4117 [Ben Laurie (CHATS)]
4119 *) Convert sprintf()/BIO_puts() to BIO_printf().
4120 [Ben Laurie (CHATS)]
4122 *) buffer_gets() could terminate with the buffer only half
4124 [Ben Laurie (CHATS)]
4126 *) Add assertions to prevent user-supplied crypto functions from
4127 overflowing internal buffers by having large block sizes, etc.
4128 [Ben Laurie (CHATS)]
4130 *) New OPENSSL_assert() macro (similar to assert(), but enabled
4132 [Ben Laurie (CHATS)]
4134 *) Eliminate unused copy of key in RC4.
4135 [Ben Laurie (CHATS)]
4137 *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
4138 [Ben Laurie (CHATS)]
4140 *) Fix off-by-one error in EGD path.
4141 [Ben Laurie (CHATS)]
4143 *) If RANDFILE path is too long, ignore instead of truncating.
4144 [Ben Laurie (CHATS)]
4146 *) Eliminate unused and incorrectly sized X.509 structure
4148 [Ben Laurie (CHATS)]
4150 *) Eliminate unused and dangerous function knumber().
4151 [Ben Laurie (CHATS)]
4153 *) Eliminate unused and dangerous structure, KSSL_ERR.
4154 [Ben Laurie (CHATS)]
4156 *) Protect against overlong session ID context length in an encoded
4157 session object. Since these are local, this does not appear to be
4159 [Ben Laurie (CHATS)]
4161 *) Change from security patch (see 0.9.6e below) that did not affect
4162 the 0.9.6 release series:
4164 Remote buffer overflow in SSL3 protocol - an attacker could
4165 supply an oversized master key in Kerberos-enabled versions.
4167 [Ben Laurie (CHATS)]
4169 *) Change the SSL kerb5 codes to match RFC 2712.
4172 *) Make -nameopt work fully for req and add -reqopt switch.
4173 [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
4175 *) The "block size" for block ciphers in CFB and OFB mode should be 1.
4176 [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
4178 *) Make sure tests can be performed even if the corresponding algorithms
4179 have been removed entirely. This was also the last step to make
4180 OpenSSL compilable with DJGPP under all reasonable conditions.
4181 [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
4183 *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
4184 to allow version independent disabling of normally unselected ciphers,
4185 which may be activated as a side-effect of selecting a single cipher.
4187 (E.g., cipher list string "RSA" enables ciphersuites that are left
4188 out of "ALL" because they do not provide symmetric encryption.
4189 "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
4190 [Lutz Jaenicke, Bodo Moeller]
4192 *) Add appropriate support for separate platform-dependent build
4193 directories. The recommended way to make a platform-dependent
4194 build directory is the following (tested on Linux), maybe with
4197 # Place yourself outside of the OpenSSL source tree. In
4198 # this example, the environment variable OPENSSL_SOURCE
4199 # is assumed to contain the absolute OpenSSL source directory.
4200 mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
4201 cd objtree/"`uname -s`-`uname -r`-`uname -m`"
4202 (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
4203 mkdir -p `dirname $F`
4204 ln -s $OPENSSL_SOURCE/$F $F
4207 To be absolutely sure not to disturb the source tree, a "make clean"
4208 is a good thing. If it isn't successfull, don't worry about it,
4209 it probably means the source directory is very clean.
4212 *) Make sure any ENGINE control commands make local copies of string
4213 pointers passed to them whenever necessary. Otherwise it is possible
4214 the caller may have overwritten (or deallocated) the original string
4215 data when a later ENGINE operation tries to use the stored values.
4216 [Götz Babin-Ebell <babinebell@trustcenter.de>]
4218 *) Improve diagnostics in file reading and command-line digests.
4219 [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
4221 *) Add AES modes CFB and OFB to the object database. Correct an
4222 error in AES-CFB decryption.
4225 *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this
4226 allows existing EVP_CIPHER_CTX structures to be reused after
4227 calling EVP_*Final(). This behaviour is used by encryption
4228 BIOs and some applications. This has the side effect that
4229 applications must explicitly clean up cipher contexts with
4230 EVP_CIPHER_CTX_cleanup() or they will leak memory.
4233 *) Check the values of dna and dnb in bn_mul_recursive before calling
4234 bn_mul_comba (a non zero value means the a or b arrays do not contain
4235 n2 elements) and fallback to bn_mul_normal if either is not zero.
4238 *) Fix escaping of non-ASCII characters when using the -subj option
4239 of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
4242 *) Make object definitions compliant to LDAP (RFC2256): SN is the short
4243 form for "surname", serialNumber has no short form.
4244 Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
4245 therefore remove "mail" short name for "internet 7".
4246 The OID for unique identifiers in X509 certificates is
4247 x500UniqueIdentifier, not uniqueIdentifier.
4248 Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
4251 *) Add an "init" command to the ENGINE config module and auto initialize
4252 ENGINEs. Without any "init" command the ENGINE will be initialized
4253 after all ctrl commands have been executed on it. If init=1 the
4254 ENGINE is initailized at that point (ctrls before that point are run
4255 on the uninitialized ENGINE and after on the initialized one). If
4256 init=0 then the ENGINE will not be iniatialized at all.
4259 *) Fix the 'app_verify_callback' interface so that the user-defined
4260 argument is actually passed to the callback: In the
4261 SSL_CTX_set_cert_verify_callback() prototype, the callback
4262 declaration has been changed from
4265 int (*cb)(X509_STORE_CTX *,void *);
4266 in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
4267 i=s->ctx->app_verify_callback(&ctx)
4268 has been changed into
4269 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
4271 To update applications using SSL_CTX_set_cert_verify_callback(),
4272 a dummy argument can be added to their callback functions.